Name AP Physics 1 Period Date Kinematics: Speeding Up and Slowing Down Six different scenarios follow in which a low friction car moves along a track. You will first observe each of the motions. You will then predict and sketch the position vs. time and velocity vs. time graphs. Check your predictions using the motion sensor. 1. Downhill, moving away from motion sensor Observe the motion of the cart starting from rest and rolling down the incline without using the motion detector. b. Record the graphs as displayed by the motion detector. position position a. Predict the graphs describing the motion. Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero acceleration acceleration velocity velocity Slope represents velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents acceleration Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the position change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? No If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow 2. Uphill, moving away from motion sensor First observe the motion of the cart slowing after an initial push without using the motion detector. Answer the following questions for the cart while coasting (after the push is over). Give the cart an initial push up the ramp. b. Record the graphs as displayed by the motion detector. position position a. Predict the graphs describing the motion. Stop the cart at its highest point. Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents velocity acceleration acceleration velocity velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents acceleration Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the velocity change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? No If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative? h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow 3. Downhill, moving toward motion sensor Observe the motion of the cart starting from rest and rolling down the incline without using the motion detector. b. Record the graphs as displayed by the motion detector. position a. Predict the graphs describing the motion. Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents velocity acceleration velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents acceleration Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the position change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? No If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative? h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow 4. Uphill, moving toward motion sensor Catch the cart at its highest point on the ramp. b. Record the graphs as displayed by the motion detector. position position a. Predict the graphs describing the motion. Give the cart an initial push up the ramp. Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero acceleration acceleration velocity velocity Slope represents velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents _____________ Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the position change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? No If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative? h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow 5. Up and down the ramp, motion sensor at the bottom Give the cart an initial push up the ramp. Catch the cart after it goes up and back down the ramp. b. Record the graphs as displayed by the motion detector. position a. Predict the graphs describing the motion. Slope is (circle one) constant, increasing or decreasing Slope is positive, zero, and negative Slope represents velocity acceleration velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents acceleration Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the position change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? Yes If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow 6. Up and down the ramp, motion sensor at the top Catch the cart after it goes up and down the ramp b. Record the graphs as displayed by the motion detector. position a. Predict the graphs describing the motion. Give the cart an initial push up the ramp. Slope is (circle one) constant, increasing or decreasing Slope is neg., zero, then pos. Slope represents velocity acceleration velocity Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents acceleration Slope is (circle one) constant, increasing or decreasing Slope is positive, negative or zero Slope represents rate of ∆ of acceleration c) Is the position positive or negative? d) Does the direction of the position change? No If so, indicate when on the observed graph with an arrow e) Is the velocity positive or negative? f) Does the direction of the velocity change? Yes If so, indicate when on the observed graph with an arrow g) Is the acceleration positive or negative? h) Does the direction of the acceleration change? No If so, indicate when on the observed graph with an arrow

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