Quiz
What do you want to know?
1. nothing
2. everything
What do you want to know?
1. nothing
2. everything X
An airtight box has a pressure inside of zero. It is sealed and taken
up a mountain where the pressure
outside is 0.85 × 105P a. The area of
the lid is 0.013m2. What force do
you have to apply lift the lid?
1. 1000N
2. 1100N
3. 1200N
4. 2200N
An airtight box has a pressure inside of zero. It is sealed and taken
up a mountain where the pressure
outside is 0.85 × 105P a. The area of
the lid is 0.013m2. What force do
you have to apply lift the lid?
1. 1000N
2. 1100N X
3. 1200N
4. 2200N
A submersible pump is put underwater in a well
and used to push water up a pipe. What is the
minimum pressure the pump must be able to create
to raise water to a height of 71m? Density of water
is 1, 000kg/m3
1. 5 × 105P a
2. 6 × 105P a
3. 7 × 105P a
4. 8 × 105P a
5. 9 × 105P a
6. Voltron
A submersible pump is put underwater in a well
and used to push water up a pipe. What is the
minimum pressure the pump must be able to create
to raise water to a height of 71m? Density of water
is 1, 000kg/m3
1. 5 × 105P a
2. 6 × 105P a
3. 7 × 105P a X
4. 8 × 105P a
5. 9 × 105P a
6. Voltron
Human lungs work well as long as
the pressure difference between inside and outside is 1/20 an atmosphere. To what depth can someone with a long snorkel dive if the
density of sea water is 1025 kg/m3?
1. 0.25m
2. 0.50m
3. 0.75m
4. 1.0m
Human lungs work well as long as
the pressure difference between inside and outside is 1/20 an atmosphere. To what depth can someone with a long snorkel dive if the
density of sea water is 1025 kg/m3?
1. 0.25m
2. 0.50m X
3. 0.75m
4. 1.0m
The density of the Sun is 1400 kg/m3.
Will the Sun sink or float in water?
1. Sink
2. Float
3. Boil
The density of the Sun is 1400 kg/m3.
Will the Sun sink or float in water?
1. Sink X
2. Float
3. Boil
Wind blows across your roof at 15
m/s. The density of air is 1.29 kg/m3.
Determine the reduction of pressure
between this air and stationary air.
1. 50 Pa
2. 100 Pa
3. 150 Pa
4. 200 Pa
5. 250 Pa
Wind blows across your roof at 15
m/s. The density of air is 1.29 kg/m3.
Determine the reduction of pressure
between this air and stationary air.
1. 50 Pa
2. 100 Pa
3. 150 Pa X
4. 200 Pa
5. 250 Pa
A hand exerciser uses a spring. A
force of 89N is required to compress
the spring by 0.0191m. Determine
the force needed to compress the
spring by 0.0508m.
1. 237N
2. 207N
3. 257N
4. 5N
5. 1B
6. 10,000N
A hand exerciser uses a spring. A
force of 89N is required to compress
the spring by 0.0191m. Determine
the force needed to compress the
spring by 0.0508m.
1. 237N X
2. 207N
3. 257N
4. 5N
5. 1B
6. 10,000N
A human eardrum vibrates about its equilibrium position. This vibration has an
amplitude of 6.3 × 10−7m and a max speed
of 2.9 × 10−3m/s. What is the frequency of
the vibration?
1. 500Hz
2. 630Hz
3. 700Hz
4. 730Hz
5. 800Hz
6. 830Hz
A human eardrum vibrates about its equilibrium position. This vibration has an
amplitude of 6.3 × 10−7m and a max speed
of 2.9 × 10−3m/s. What is the frequency of
the vibration?
1. 500Hz
2. 630Hz
3. 700Hz
4. 730Hz X
5. 800Hz
6. 830Hz
You are bouncing on your bed and always
staying in contact with it. This creates
simple harmonic motion and takes 1.9s to
complete one cycle. The height of each
bounce is 45cm. Determine the amplitude.
1. 0.225m
2. 0.45m
3. 0.90m
4. 45m
5. 22.5m
6. 7 yeards
You are bouncing on your bed and always
staying in contact with it. This creates
simple harmonic motion and takes 1.9s to
complete one cycle. The height of each
bounce is 45cm. Determine the amplitude.
1. 0.225m
2. 0.45m X
3. 0.90m
4. 45m
5. 22.5m
6. 7 yeards
You are bouncing on your bed and always
staying in contact with it. This creates
simple harmonic motion and takes 1.9s to
complete one cycle. The height of each
bounce is 45cm. Determine the angular
frequency.
1. 12rad/s
2. 3.31m/s
3. 5rad/s
4. 5m/s
5. 3.31rad/s
You are bouncing on your bed and always
staying in contact with it. This creates
simple harmonic motion and takes 1.9s to
complete one cycle. The height of each
bounce is 45cm. Determine the angular
frequency.
1. 12rad/s
2. 3.31m/s
3. 5rad/s
4. 5m/s
5. 3.31rad/s X
You are bouncing on your bed and always staying in contact with it. This creates simple harmonic
motion and takes 1.9s to complete one cycle. The
height of each bounce is 45cm. Determine the maximum speed you experience.
1. 1.49m/s
2. 2m/s
3. 5m/s
4. 1m/s
5. 0m/s
6. 100rad/s
You are bouncing on your bed and always staying in contact with it. This creates simple harmonic
motion and takes 1.9s to complete one cycle. The
height of each bounce is 45cm. Determine the maximum speed you experience.
1. 1.49m/s X
2. 2m/s
3. 5m/s
4. 1m/s
5. 0m/s
6. 100rad/s
A pen contains a spring with a spring constant of 250N/m.
When the tip of the pen is retracted the spring is compressed
by 5mm from its unscratched length. To push the tip into the
locked position, you must compress the spring an additional
6mm. How much work is done by the spring force to extend
the tip?
1. 0.12J
2. -0.12N
3. -0.012J
4. 0.012Nm
5. -0.12kg
A pen contains a spring with a spring constant of 250N/m.
When the tip of the pen is retracted the spring is compressed
by 5mm from its unscratched length. To push the tip into the
locked position, you must compress the spring an additional
6mm. How much work is done by the spring force to extend
the tip?
1. 0.12J
2. -0.12N
3. -0.012J X
4. 0.012Nm
5. -0.12kg
A 49N weight is attached to your
foot and is extended at an angle θ.
When θ is 90 degrees, what is the
magnitude of the torque exerted if
your leg is .55m long.
1. 22Nm
2. 20Nm
3. 29Nm
4. 27Nm
5. 30Nm
6. 32Nm
A 49N weight is attached to your
foot and is extended at an angle θ.
When θ is 90 degrees, what is the
magnitude of the torque exerted if
your leg is .55m long.
1. 22Nm
2. 20Nm
3. 29Nm
4. 27Nm X
5. 30Nm
6. 32Nm
Dude stands on the floor. His upper body weighs 438N
and has a center of gravity 1.28m above the floor. His middle
body has a weight of 144N and a center of gravity 0.76m
above the floor. His lower body has a weight of 87N and a
center of gravity 0.25m above the floor. Find the location of
his center of his entire bodies center of gravity.
1. 10.3m
2. 1.03m
3. -1.03m
4. 103m
5. 423J
Dude stands on the floor. His upper body weighs 438N
and has a center of gravity 1.28m above the floor. His middle
body has a weight of 144N and a center of gravity 0.76m
above the floor. His lower body has a weight of 87N and a
center of gravity 0.25m above the floor. Find the location of
his center of his entire bodies center of gravity.
1. 10.3m
2. 1.03m X
3. -1.03m
4. 103m
5. 423J
In an isometric exercise a person places a hand on a scale
and pushes vertically down, keeping the forearm horizontal.
The forearm weighs 22N and has a center of gravity .15m
from the elbow. The scale registers 111N and is .3m from
the elbow.
The muscle attaches -0.025m from the elbow.
Find the magnitude of the muscle force.
1. 500N
2. 2000N
3. 1700N
4. 1200N
5. 65N
In an isometric exercise a person places a hand on a scale
and pushes vertically down, keeping the forearm horizontal.
The forearm weighs 22N and has a center of gravity .15m
from the elbow. The scale registers 111N and is .3m from
the elbow.
The muscle attaches -0.025m from the elbow.
Find the magnitude of the muscle force.
1. 500N
2. 2000N
3. 1700N
4. 1200N X
5. 65N
Calculate the rotational kinetic energy of Earth based on its rotation
around its axis. M = 5.98 × 1024kg,
r = 6.38 × 106m, I = 2/5mr2
1. 4.26 × 1028J
2. 2.57 × 1027J
3. 2.57 × 1029J
4. 2.55 × 1020J
5. 2.57 × 1022J
Calculate the rotational kinetic energy of Earth based on its rotation
around its axis. M = 5.98 × 1024kg,
r = 6.38 × 106m, I = 2/5mr2
1. 4.26 × 1028J
2. 2.57 × 1027J
3. 2.57 × 1029J X
4. 2.55 × 1020J
5. 2.57 × 1022J
A curveball takes 0.6s to reach the
catcher. If it spins with an angular
velocity of 330 rev/min, what is the
angular displacement of the ball?
1. 19rad
2. 21rad
3. 23rad
4. 25rad
5. 254897897897897.2rad
A curveball takes 0.6s to reach the
catcher. If it spins with an angular
velocity of 330 rev/min, what is the
angular displacement of the ball?
1. 19rad
2. 21rad X
3. 23rad
4. 25rad
5. 254897897897897.2rad
The shaft of a pump starts from
rest and has an angular acceleration
of 3.00rad/s2 for 18s. At the end of
this time what is the shafts angular
speed?
1. 98rad/s
2. 75rad/s
3. 54rad/s
4. 33rad/s
5. 22rad/s
6. 1rad/s
The shaft of a pump starts from
rest and has an angular acceleration
of 3.00rad/s2 for 18s. At the end of
this time what is the shafts angular
speed?
1. 98rad/s
2. 75rad/s
3. 54rad/s X
4. 33rad/s
5. 22rad/s
6. 1rad/s
A fan blade rotates with constant
angular acceleration of 12rad/s2. at
what point on the blade measured
from the axis of rotation, does the
tangential acceleration equal the acceleration due to gravity?
1. 0.517m
2. 0.617m
3. 0.717m
4. 0.817m
5. 0.917m
A fan blade rotates with constant
angular acceleration of 12rad/s2. at
what point on the blade measured
from the axis of rotation, does the
tangential acceleration equal the acceleration due to gravity?
1. 0.517m
2. 0.617m
3. 0.717m
4. 0.817m X
5. 0.917m
You are currently riding a stationary bike.
1. True
2. False
You are currently riding a stationary bike.
1. True
2. False X
You are riding a stationary bike which tells you
the wheel is spinning at 9.1rad/s. If you ride for
35min, how far would you have traveled if you went
out in the real world to bike instead of staying inside? The radius of the bike is 0.45m.
1. 860m
2. 86km
3. 860000cm
4. 5 lifetimes
5. 100 years
6. 8 days
You are riding a stationary bike which tells you
the wheel is spinning at 9.1rad/s. If you ride for
35min, how far would you have traveled if you went
out in the real world to bike instead of staying inside? The radius of the bike is 0.45m.
1. 860m
2. 86km
3. 860000cm X
4. 5 lifetimes
5. 100 years
6. 8 days
A car takes 9.0s to accelerate from
rest to 27m/s. find the average force
that acts on the car if it has a mass
of 1400kg
1. 4200N
2. 4000N
3. 4400N
4. 30N
5. 588N
6. 2200N
A car takes 9.0s to accelerate from
rest to 27m/s. find the average force
that acts on the car if it has a mass
of 1400kg
1. 4200N X
2. 4000N
3. 4400N
4. 30N
5. 588N
6. 2200N
A volleyball is spiked so that it’s incoming velocity of 4.0 m/s is changed to an
outgoing velocity of -21 m/s. If the ball
has mass of 0.35kg, what is the impulse
the player applies
1. 8.7s
2. 8.7 kg·m
s
3. −8.7 kg·m
s
4. −8.7kg
5. −870 kg·m
s
A volleyball is spiked so that it’s incoming velocity of 4.0 m/s is changed to an
outgoing velocity of -21 m/s. If the ball
has mass of 0.35kg, what is the impulse
the player applies
1. 8.7s
2. 8.7 kg·m
s
3. −8.7 kg·m
s X
4. −8.7kg
5. −870 kg·m
s
In a footieball game, a receiver is standing still having just
caught the ball. Before he can move, a tackler, running with
velocity +4.5 m/s grabs him.
The tackler holds onto the
receiver and the two move off together with a velocity of
+2.6 m/s. the mass of the tackler is 115 kg. What type of
collision is this?
1. Elastic
2. Inelastic
3. Forever
4. Loving
5. Sad
In a footieball game, a receiver is standing still having just
caught the ball. Before he can move, a tackler, running with
velocity +4.5 m/s grabs him.
The tackler holds onto the
receiver and the two move off together with a velocity of
+2.6 m/s. the mass of the tackler is 115 kg. What type of
collision is this?
1. Elastic
2. Inelastic X
3. Forever
4. Loving
5. Sad
In a footieball game, a receiver is standing still having just
caught the ball. Before he can move, a tackler, running with
velocity +4.5 m/s grabs him.
The tackler holds onto the
receiver and the two move off together with a velocity of +2.6
m/s. the mass of the tackler is 115 kg. Assuming momentum
is conserved, find the mass of the receiver.
1. 74Kg
2. 84Kg
3. 94Kg
4. 104Kg
5. 9Kg
In a footieball game, a receiver is standing still having just
caught the ball. Before he can move, a tackler, running with
velocity +4.5 m/s grabs him.
The tackler holds onto the
receiver and the two move off together with a velocity of +2.6
m/s. the mass of the tackler is 115 kg. Assuming momentum
is conserved, find the mass of the receiver.
1. 74Kg
2. 84Kg X
3. 94Kg
4. 104Kg
5. 9Kg
A 2 stage rocket moves in space at a constant velocity of
4900m/s. the 2 stages are then seperated by a small explosion
between them. Immediately after the explosion the velocity
of the 1200kg upper stage is 5700m/s in the same direction.
What is the final velocity of the lower 2400kg stage?
1. 0m/s
2. -1100m/s
3. 5700m/s
4. -2500m/s
5. 4500m/s
6. -4500m/s
A 2 stage rocket moves in space at a constant velocity of
4900m/s. the 2 stages are then seperated by a small explosion
between them. Immediately after the explosion the velocity
of the 1200kg upper stage is 5700m/s in the same direction.
What is the final velocity of the lower 2400kg stage?
1. 0m/s
2. -1100m/s
3. 5700m/s
4. -2500m/s
5. 4500m/s X
6. -4500m/s
A car mass 1100kg is traveling at
32 m/s when it collides head on with
an suv mass 2500kg. They stop together. What was the suvs initial
speed?
1. 5m/s
2. -10m/s
3. 14m/s
4. -19m/s
5. 21m/s
6. -14m/s
A car mass 1100kg is traveling at
32 m/s when it collides head on with
an suv mass 2500kg. They stop together. What was the suvs initial
speed?
1. 5m/s
2. -10m/s
3. 14m/s
4. -19m/s
5. 21m/s
6. -14m/s X
A cue ball m=0.165kg, is at rest
on a table. It is struck by a stick
in the center with an impulse of 1.5
Ns. The ball then strikes another
ball of equal mass perfecly elastically. What is the velocity of the
second ball?
1. -9.09m/s
2. 9.09m/s
3. 4.54m/s
4. -4.54m/s
A cue ball m=0.165kg, is at rest
on a table. It is struck by a stick
in the center with an impulse of 1.5
Ns. The ball then strikes another
ball of equal mass perfecly elastically. What is the velocity of the
second ball?
1. -9.09m/s
2. 9.09m/s X
3. 4.54m/s
4. -4.54m/s
A cable lifts a 1200kg car at a constant velocity for a distance of 35m.
What is the work done by the tension in the cable?
1. 410,000J
2. -410,000J
3. 205,000J
4. -205,000J
A cable lifts a 1200kg car at a constant velocity for a distance of 35m.
What is the work done by the tension in the cable?
1. 410,000J X
2. -410,000J
3. 205,000J
4. -205,000J
185,000J accelerate a car from 23m/s
to 28m/s. What is the cars mass?
1. -1450Kg
2. 2900Kg
3. 1450Kg
4. 725Kg
185,000J accelerate a car from 23m/s
to 28m/s. What is the cars mass?
1. -1450Kg
2. 2900Kg
3. 1450Kg X
4. 725Kg
A shot putter throws a shot (weight 71.1N)
that leaves his hand at a distance of 1.52m
above the ground. How much works is
done by gravity when the ball is 2.13m
above the ground.
1. 43J
2. -43J
3. 500J
4. -10J
5. 15J
6. -100J
A shot putter throws a shot (weight 71.1N)
that leaves his hand at a distance of 1.52m
above the ground. How much works is
done by gravity when the ball is 2.13m
above the ground.
1. 43J
2. -43J X
3. 500J
4. -10J
5. 15J
6. -100J
One kilowatt hour is the amount of work
or energy generated when one kilowatt of
power is supplied for a time of one hour.
Determine the number of joules of energy
in one kilowatt hour.
1. 36J
2. 360J
3. 3600J
4. 36000J
5. -12J
6. 6J
One kilowatt hour is the amount of work
or energy generated when one kilowatt of
power is supplied for a time of one hour.
Determine the number of joules of energy
in one kilowatt hour.
1. 36J
2. 360J
3. 3600J X
4. 36000J
5. -12J
6. 6J
A concrete block is pulled 7.0 m
across a frictionless surface by means
of a rope. The tension in the rope
is 40 N; and the net work done on
the block is 247 J. What angle does
the rope make with the horizontal?
1. 28◦
2. 41◦
3. 47◦
4. 62◦
5. 88◦
A concrete block is pulled 7.0 m
across a frictionless surface by means
of a rope. The tension in the rope
is 40 N; and the net work done on
the block is 247 J. What angle does
the rope make with the horizontal?
1. 28◦ X
2. 41◦
3. 47◦
4. 62◦
5. 88◦
Mike is cutting the grass using a human-powered
lawn mower. He pushes the mower with a force of
45 N directed at an angle of 41 below the horizontal
direction. Calculate the work that Mike does on
the mower each time he pushes it 9.1 m across the
yard.
1. 510 J
2. 260 J
3. 410 J
4. 360 J
5. 310 J
Mike is cutting the grass using a human-powered
lawn mower. He pushes the mower with a force of
45 N directed at an angle of 41 below the horizontal
direction. Calculate the work that Mike does on
the mower each time he pushes it 9.1 m across the
yard.
1. 510 J
2. 260 J
3. 410 J
4. 360 J
5. 310 J X
A 1.0-kg ball on the end of a string
is whirled at a constant speed of
2.0 m/s in a horizontal circle of radius 1.5 m. What is the work done
by the centripetal force during one
revolution?
1. zero joules
2. 2.7 J
3. 6.0 J
4. 25 J
5. 33 J
A 1.0-kg ball on the end of a string
is whirled at a constant speed of
2.0 m/s in a horizontal circle of radius 1.5 m. What is the work done
by the centripetal force during one
revolution?
1. zero joules X
2. 2.7 J
3. 6.0 J
4. 25 J
5. 33 J
Larry’s gravitational potential energy is
1870 J as he sits 2.20 m above the ground
in a sky diving airplane before it takes off.
What is Larry’s gravitational potential energy when be begins to jump from the airplane at an altitude of 923 m?
1. 7.85 × 105J
2. 1.87 × 103J
3. 3.29 × 104J
4. 9.36 × 102J
5. 4.22 × 106J
Larry’s gravitational potential energy is
1870 J as he sits 2.20 m above the ground
in a sky diving airplane before it takes off.
What is Larry’s gravitational potential energy when be begins to jump from the airplane at an altitude of 923 m?
1. 7.85 × 105J X
2. 1.87 × 103J
3. 3.29 × 104J
4. 9.36 × 102J
5. 4.22 × 106J
Which one of the following choices
is an example of a conservative force?
1. tension
2. normal force
3. static frictional force
4. elastic spring force
Which one of the following choices
is an example of a conservative force?
1. tension
2. normal force
3. static frictional force
4. elastic spring force X
A pebble rolls off the roof of Science Hall and falls vertically. Just
before it reaches the ground, the
pebble’s speed is 17 m/s. Neglect
air resistance and determine the
height of Science Hall.
1. 42 m
2. 33 m
3. 26 m
4. 21 m
5. 15 m
A pebble rolls off the roof of Science Hall and falls vertically. Just
before it reaches the ground, the
pebble’s speed is 17 m/s. Neglect
air resistance and determine the
height of Science Hall.
1. 42 m
2. 33 m
3. 26 m
4. 21 m
5. 15 m X
A bicyclist is traveling at a speed
of 20.0 m/s as he approaches the
bottom of a hill. He decides to coast
up the hill and stops upon reaching
the top. Neglecting friction, determine the vertical height of the hill.
1. 28.5 m
2. 3.70 m
3. 11.2 m
4. 40.8 m
5. 20.4 m
A bicyclist is traveling at a speed
of 20.0 m/s as he approaches the
bottom of a hill. He decides to coast
up the hill and stops upon reaching
the top. Neglecting friction, determine the vertical height of the hill.
1. 28.5 m
2. 3.70 m
3. 11.2 m
4. 40.8 m
5. 20.4 m X
An engineer is asked to design a
playground slide such that the speed
a child reaches at the bottom does
not exceed 6.0 m/s. Determine the
maximum height that the slide can
be.
1. 1.8 m
2. 2.9 m
3. 3.2 m
4. 4.5 m
5. 7.4 m
An engineer is asked to design a
playground slide such that the speed
a child reaches at the bottom does
not exceed 6.0 m/s. Determine the
maximum height that the slide can
be.
1. 1.8 m X
2. 2.9 m
3. 3.2 m
4. 4.5 m
5. 7.4 m
A physics student shoves a 0.50-kg block
from the bottom of a frictionless 30.0 inclined plane. The student performs 4.0 J
of work and the block slides a distance s
along the incline before it stops. Determine the value of s.
1. 8.0 cm
2. 16 cm
3. 82 cm
4. 160 cm
5. 330 cm
A physics student shoves a 0.50-kg block
from the bottom of a frictionless 30.0 inclined plane. The student performs 4.0 J
of work and the block slides a distance s
along the incline before it stops. Determine the value of s.
1. 8.0 cm
2. 16 cm
3. 82 cm
4. 160 cm X
5. 330 cm
An automobile approaches a barrier at a speed of
20 m/s along a level road. The driver locks the
brakes at a distance of 50 m from the barrier. What
minimum coefficient of kinetic friction is required
to stop the automobile before it hits the barrier?
1. 0.4
2. 0.5
3. 0.6
4. 0.7
5. 0.8
An automobile approaches a barrier at a speed of
20 m/s along a level road. The driver locks the
brakes at a distance of 50 m from the barrier. What
minimum coefficient of kinetic friction is required
to stop the automobile before it hits the barrier?
1. 0.4 X
2. 0.5
3. 0.6
4. 0.7
5. 0.8
An escalator is 30.0 meters long
and slants at 30.0◦ relative to the
horizontal. If it moves at 1.00 m/s,
at what rate does it do work in lifting a 50.0-kg woman from the bottom to the top of the escalator?
1. 49.3 W
2. 98.0 W
3. 245 W
4. 292 W
5. 495 W
An escalator is 30.0 meters long
and slants at 30.0◦ relative to the
horizontal. If it moves at 1.00 m/s,
at what rate does it do work in lifting a 50.0-kg woman from the bottom to the top of the escalator?
1. 49.3 W
2. 98.0 W
3. 245 W X
4. 292 W
5. 495 W
A warehouse worker uses a forklift to raise a crate
of pickles on a platform to a height 2.75 m above
the floor. The combined mass of the platform and
the crate is 207 kg. If the power expended by the
forklift is 1440 W, how long does it take to lift the
crate?
1. 37.2 s
2. 5.81 s
3. 3.87 s
4. 18.6 s
5. 1.86 s
A warehouse worker uses a forklift to raise a crate
of pickles on a platform to a height 2.75 m above
the floor. The combined mass of the platform and
the crate is 207 kg. If the power expended by the
forklift is 1440 W, how long does it take to lift the
crate?
1. 37.2 s
2. 5.81 s
3. 3.87 s X
4. 18.6 s
5. 1.86 s
The second hand on a watch has
a length of 4.50 mm and makes one
revolution in 60.00 s. What is the
speed of the end of the second hand
as it moves in uniform circular motion?
1. 9.42 × 10−4m/s
2. 2.67 × 10−3m/s
3. 5.34 × 10−3m/s
4. 4.71 × 10−4m/s
5. 2.36 × 10−5m/s
The second hand on a watch has
a length of 4.50 mm and makes one
revolution in 60.00 s. What is the
speed of the end of the second hand
as it moves in uniform circular motion?
1. 9.42 × 10−4m/s
2. 2.67 × 10−3m/s
3. 5.34 × 10−3m/s
4. 4.71 × 10−4m/s X
5. 2.36 × 10−5m/s
A car traveling at 20 m/s follows
a curve in the road so that its centripetal acceleration is 5m/s2. What
is the radius of the curve?
1. 4 m
2. 8 m
3. 80 m
4. 160 m
5. 640 m
A car traveling at 20 m/s follows
a curve in the road so that its centripetal acceleration is 5m/s2. What
is the radius of the curve?
1. 4 m
2. 8 m
3. 80 m X
4. 160 m
5. 640 m
A satellite is placed in a circular orbit to observe
the surface of Mars from an altitude of 144 km. The
equatorial radius of Mars is 3397 km. If the speed
of the satellite is 3480 m/s, what is the magnitude
of the centripetal acceleration of the satellite?
1. 2.17m/s2
2. 2.60m/s2
3. 2.99m/s2
4. 3.42m/s2
5. 4.05m/s2
A satellite is placed in a circular orbit to observe
the surface of Mars from an altitude of 144 km. The
equatorial radius of Mars is 3397 km. If the speed
of the satellite is 3480 m/s, what is the magnitude
of the centripetal acceleration of the satellite?
1. 2.17m/s2
2. 2.60m/s2
3. 2.99m/s2
4. 3.42m/s2 X
5. 4.05m/s2
A 0.25-kg ball attached to a string
is rotating in a horizontal circle of
radius 0.5 m. If the ball revolves
twice every second, what is the tension in the string?
1. 2 N
2. 5 N
3. 7 N
4. 10 N
5. 20 N
A 0.25-kg ball attached to a string
is rotating in a horizontal circle of
radius 0.5 m. If the ball revolves
twice every second, what is the tension in the string?
1. 2 N
2. 5 N
3. 7 N
4. 10 N
5. 20 N X
Holly puts a box into the trunk of her car. Later, she drives around
an unbanked curve that has a radius of 48 m. The speed of the car on
the curve is 16 m/s, but the box remains stationary relative to the floor
of the trunk. Determine the minimum coefficient of static friction for the
box on the floor of the trunk.
1. 0.42
2. 0.54
3. 0.17
4. 0.33
5. This cannot be determined without knowing the
mass of the box.
Holly puts a box into the trunk of her car. Later, she drives around
an unbanked curve that has a radius of 48 m. The speed of the car on
the curve is 16 m/s, but the box remains stationary relative to the floor
of the trunk. Determine the minimum coefficient of static friction for the
box on the floor of the trunk.
1. 0.42
2. 0.54 X
3. 0.17
4. 0.33
5. This cannot be determined without knowing the
mass of the box.
A space station is designed in the shape of a large,
hollow donut that is uniformly rotating. The outer
radius of the station is 350 m. With what period
must the station rotate so that a person sitting on
the outer wall experiences “artificial gravity,” i.e.
an acceleration of 9.8m/s2?
1. 230 s
2. 170 s
3. 110 s
4. 76 s
5. 38 s
A space station is designed in the shape of a large,
hollow donut that is uniformly rotating. The outer
radius of the station is 350 m. With what period
must the station rotate so that a person sitting on
the outer wall experiences “artificial gravity,” i.e.
an acceleration of 9.8m/s2?
1. 230 s
2. 170 s
3. 110 s
4. 76 s
5. 38 s X
A plane is traveling at 200 m/s following
the arc of a vertical circle of radius R. At
the top of its path, the passengers experience “weightlessness.” To one significant
figure, what is the value of R?
1. 200 m
2. 1000 m
3. 2000 m
4. 4000 m
5. 40 000 m
A plane is traveling at 200 m/s following
the arc of a vertical circle of radius R. At
the top of its path, the passengers experience “weightlessness.” To one significant
figure, what is the value of R?
1. 200 m
2. 1000 m
3. 2000 m
4. 4000 m X
5. 40 000 m
When the net force that acts on a
hockey puck is 12 N, the puck accelerates at a rate of 48 m/s2. Determine the mass of the puck.
1. 0.25 kg
2. 1.0 kg
3. 5.0 kg
4. 2.5 kg
5. 2.0 kg
When the net force that acts on a
hockey puck is 12 N, the puck accelerates at a rate of 48 m/s2. Determine the mass of the puck.
1. 0.25 kg X
2. 1.0 kg
3. 5.0 kg
4. 2.5 kg
5. 2.0 kg
A net force of 25 N is applied for
5.7 s to a 12 kg box initially at rest.
What is the speed of the box at the
end of the 5.7-s interval?
1. 1.8 m/s
2. 12 m/s
3. 3.0 m/s
4. 7.5 m/s
5. 30 m/s
A net force of 25 N is applied for
5.7 s to a 12 kg box initially at rest.
What is the speed of the box at the
end of the 5.7-s interval?
1. 1.8 m/s
2. 12 m/s X
3. 3.0 m/s
4. 7.5 m/s
5. 30 m/s
A 975-kg car accelerates from rest
to 26.7 m/s in a distance of 120 m.
What is the magnitude of the average net force acting on the car?
1. 740 N
2. 2900 N
3. 91 N
4. 1300 N
5. 7900 N
A 975-kg car accelerates from rest
to 26.7 m/s in a distance of 120 m.
What is the magnitude of the average net force acting on the car?
1. 740 N
2. 2900 N X
3. 91 N
4. 1300 N
5. 7900 N
Two forces act on a 16-kg object. The first force
has a magnitude of 68 N and is directed 24◦ north
of east. The second force is 32 N, 48◦ north of
west. What is the acceleration of the object resulting from the application of these two forces to the
object?
1. 1.6m/s2, 5.5◦ north of east
2. 1.9m/s2, 18◦ north of west
3. 2.4m/s2, 34◦ north of east
4. 3.6m/s2, 5.5◦ north of west
5. 4.1m/s2, 52◦ north of east
Two forces act on a 16-kg object. The first force
has a magnitude of 68 N and is directed 24◦ north
of east. The second force is 32 N, 48◦ north of
west. What is the acceleration of the object resulting from the application of these two forces to the
object?
1. 1.6m/s2, 5.5◦ north of east
2. 1.9m/s2, 18◦ north of west
3. 2.4m/s2, 34◦ north of east
4. 3.6m/s2, 5.5◦ north of west
5. 4.1m/s2, 52◦ north of east X
What is the weight of a 2.50-kg
bag of sand on the surface of the
earth?
1. 2.50 N
2. 9.80 N
3. 24.5 N
4. 49.0 N
5. 98.0 N
What is the weight of a 2.50-kg
bag of sand on the surface of the
earth?
1. 2.50 N
2. 9.80 N
3. 24.5 N X
4. 49.0 N
5. 98.0 N
A 2.00-kg projectile is fired at an
angle of 20.0. What is the magnitude of the force exerted on the
projectile when it is at the highest
position in its trajectory? Neglect
any effects of air resistance.
1. 19.6 N
2. 14.7 N
3. 9.80 N
4. 4.90 N
5. 0 N
A 2.00-kg projectile is fired at an
angle of 20.0. What is the magnitude of the force exerted on the
projectile when it is at the highest
position in its trajectory? Neglect
any effects of air resistance.
1. 19.6 N X
2. 14.7 N
3. 9.80 N
4. 4.90 N
5. 0 N
The wheels of an automobile are locked
as it slides to a stop from an initial speed
of 30.0 m/s. If the coefficient of kinetic
friction is 0.600 and the road is horizontal,
approximately how long does it take the
car to stop?
1. 4.22 s
2. 5.10 s
3. 8.75 s
4. 10.4 s
5. 15.3 s
The wheels of an automobile are locked
as it slides to a stop from an initial speed
of 30.0 m/s. If the coefficient of kinetic
friction is 0.600 and the road is horizontal,
approximately how long does it take the
car to stop?
1. 4.22 s
2. 5.10 s X
3. 8.75 s
4. 10.4 s
5. 15.3 s
A boy pulls a 5.0-kg sled with a rope that makes
a 60.0 angle with respect to the horizontal surface
of a frozen pond. The boy pulls on the rope with a
force of 10.0 N; and the sled moves with constant
velocity. What is the coefficient of friction between
the sled and the ice?
1. 0.09
2. 0.12
3. 0.18
4. 0.06
5. 0.24
A boy pulls a 5.0-kg sled with a rope that makes
a 60.0 angle with respect to the horizontal surface
of a frozen pond. The boy pulls on the rope with a
force of 10.0 N; and the sled moves with constant
velocity. What is the coefficient of friction between
the sled and the ice?
1. 0.09
2. 0.12 X
3. 0.18
4. 0.06
5. 0.24
In a tug-of-war, each man on a
5-man team pulls with an average
force of 500 N. What is the tension
in the center of the rope?
1. zero newtons
2. 100 N
3. 500 N
4. 2500 N
5. 5000 N
In a tug-of-war, each man on a
5-man team pulls with an average
force of 500 N. What is the tension
in the center of the rope?
1. zero newtons
2. 100 N
3. 500 N
4. 2500 N
5. 5000 N X
A 20-kg crate is suspended from a
fixed, horizontal beam by two vertical ropes. What is the approximate
tension in each rope?
1. 10 N
2. 40 N
3. 100 N
4. 200 N
5. 390 N
A 20-kg crate is suspended from a
fixed, horizontal beam by two vertical ropes. What is the approximate
tension in each rope?
1. 10 N
2. 40 N
3. 100 N X
4. 200 N
5. 390 N
A woman stands on a bathroom scale in an elevator that is not moving. The scale reads 500 N.
The elevator then moves downward at a constant
velocity of 5 m/s. What does the scale read while
the elevator descends with constant velocity?
1. 100 N
2. 250 N
3. 500 N
4. 600 N
5. 750 N
A woman stands on a bathroom scale in an elevator that is not moving. The scale reads 500 N.
The elevator then moves downward at a constant
velocity of 5 m/s. What does the scale read while
the elevator descends with constant velocity?
1. 100 N
2. 250 N
3. 500 N X
4. 600 N
5. 750 N
A 20.0-kg package is dropped from a high tower in
still air and is “tracked” by a radar system. When
the package is 25 m above the ground, the radar
tracking indicates that its acceleration is 7.0m/s2.
Determine the force of air resistance on the package.
1. 56 N
2. 28 N
3. 280 N
4. 196 N
5. 140 N
A 20.0-kg package is dropped from a high tower in
still air and is “tracked” by a radar system. When
the package is 25 m above the ground, the radar
tracking indicates that its acceleration is 7.0m/s2.
Determine the force of air resistance on the package.
1. 56 N X
2. 28 N
3. 280 N
4. 196 N
5. 140 N
A park ranger wanted to measure the height of a tall tree. The ranger
stood 9.50 m from the base of the tree; and he observed that his line of
sight made an angle of 65.2◦ above the horizontal as he looked at the top
of the tree. The park ranger’s eyes are 1.80 m above the ground. What
is the height of the tree?
1. 5.84 m
2. 8.77 m
3. 11.7 m
4. 17.3 m
5. 22.4 m
A park ranger wanted to measure the height of a tall tree. The ranger
stood 9.50 m from the base of the tree; and he observed that his line of
sight made an angle of 65.2◦ above the horizontal as he looked at the top
of the tree. The park ranger’s eyes are 1.80 m above the ground. What
is the height of the tree?
1. 5.84 m
2. 8.77 m
3. 11.7 m
4. 17.3 m
5. 22.4 m X
A physics student standing on the edge of a cliff throws a stone vertically downward with an initial speed of 10.0 m/s. The instant before the
stone hits the ground below, it is traveling at a speed of 30.0 m/s. If the
physics student were to throw the rock horizontally outward from the cliff
instead, with the same initial speed of 10.0 m/s, what is the magnitude
of the velocity of the stone just before it hits the ground?
1. 20.0 m/s
2. 30.0 m/s
3. 40.0 m/s
4. The height of the cliff must be specified to answer
this question.
A physics student standing on the edge of a cliff throws a stone vertically downward with an initial speed of 10.0 m/s. The instant before the
stone hits the ground below, it is traveling at a speed of 30.0 m/s. If the
physics student were to throw the rock horizontally outward from the cliff
instead, with the same initial speed of 10.0 m/s, what is the magnitude
of the velocity of the stone just before it hits the ground?
1. 20.0 m/s
2. 30.0 m/s X
3. 40.0 m/s
4. The height of the cliff must be specified to answer
this question.
A tennis ball is thrown from ground
level with velocity directed 30◦ above
the horizontal. If it takes the ball
0.5 s to reach the top of its trajectory, what is the magnitude of the
initial velocity?
1. 4.9 m/s
2. 9.8 m/s
3. 11.3 m/s
4. 19.6 m/s
5. 34.4 m/s
A tennis ball is thrown from ground
level with velocity directed 30◦ above
the horizontal. If it takes the ball
0.5 s to reach the top of its trajectory, what is the magnitude of the
initial velocity?
1. 4.9 m/s X
2. 9.8 m/s
3. 11.3 m/s
4. 19.6 m/s
5. 34.4 m/s
A quarterback throws a pass at
an angle of 35◦ above the horizontal with an initial speed of 25 m/s.
The ball is caught by the receiver
2.55 seconds later. Determine the
distance the ball was thrown.
1. 13 m
2. 18 m
3. 36 m
4. 52 m
5. 72 m
A quarterback throws a pass at
an angle of 35◦ above the horizontal with an initial speed of 25 m/s.
The ball is caught by the receiver
2.55 seconds later. Determine the
distance the ball was thrown.
1. 13 m
2. 18 m
3. 36 m
4. 52 m X
5. 72 m
An arrow is shot horizontally from
a height of 4.9 m above the ground.
The initial speed of the arrow is
45 m/s. Neglecting friction, how
long will it take the arrow to hit
the ground?
1. 9.2 s
2. 6.0 s
3. 1.0 s
4. 1.4 s
5. 4.6 s
An arrow is shot horizontally from
a height of 4.9 m above the ground.
The initial speed of the arrow is
45 m/s. Neglecting friction, how
long will it take the arrow to hit
the ground?
1. 9.2 s
2. 6.0 s
3. 1.0 s X
4. 1.4 s
5. 4.6 s
A motorcycle has a velocity of 24
m/s, due south as it passes a car
with a velocity of 15 m/s, due north.
What is the magnitude and direction of the velocity of the motorcycle as seen by the driver of the car?
1. 9 m/s, north
2. 9 m/s, south
3. 15 m/s, north
4. 39 m/s, north
5. 39 m/s, south
A motorcycle has a velocity of 24
m/s, due south as it passes a car
with a velocity of 15 m/s, due north.
What is the magnitude and direction of the velocity of the motorcycle as seen by the driver of the car?
1. 9 m/s, north
2. 9 m/s, south
3. 15 m/s, north
4. 39 m/s, north
5. 39 m/s, south X
On a two lane highway, a car is following a pickup
truck. At one instant, the car has a speed of 32 m/s
and is 184 m behind the truck. At the same time,
the truck has a speed of 28 m/s. If neither vehicle
accelerates, how long will it take the car to catch
up to the truck?
1. 4.8 s
2. 24 s
3. 46 s
4. 82 s
5. 96 s
On a two lane highway, a car is following a pickup
truck. At one instant, the car has a speed of 32 m/s
and is 184 m behind the truck. At the same time,
the truck has a speed of 28 m/s. If neither vehicle
accelerates, how long will it take the car to catch
up to the truck?
1. 4.8 s
2. 24 s
3. 46 s X
4. 82 s
5. 96 s
A basketball player is running at a constant speed of 2.5 m/s when he tosses a
basketball upward with a speed of 6.0 m/s.
How far does the player run before he catches
the ball? Ignore air resistance.
1. 3.1 m
2. 4.5 m
3. The ball cannot be caught because it will fall behind the player.
4. 6.0 m
5. 7.5 m
A basketball player is running at a constant speed of 2.5 m/s when he tosses a
basketball upward with a speed of 6.0 m/s.
How far does the player run before he catches
the ball? Ignore air resistance.
1. 3.1 m X
2. 4.5 m
3. The ball cannot be caught because it will fall behind the player.
4. 6.0 m
5. 7.5 m
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