PY211_Clicker_Ch2

PY211_Clicker_Ch2 - Q2.1 An object moves along the x-axis...

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Q2.1 An object moves along the x-axis as shown in the x-t plot below. The grid spacing on the x-axis is 5 m and the grid spacing on the t-axis is 1 sec. What is the instantaneous velocity at t 1 ? t 2 ? t 3 ? 1. 25 m/s 5. 7.5 m/s 2. 2.5 m/s 6. -25 m/s 3. 0 m/s 7. -2.5 m/s 4. Infinity 8. Don’t know
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Q2.2 True or False? A car must always have an acceleration in the same direction as its velocity. 1. True 2. False 3. Don’t know
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Q2.3 True or False? It’s possible for a slowing car to have a positive acceleration. 1. True 2. False 3. Don’t know
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Q2.4 True or False? An accelerating object can never stop and remain at rest. 1. True 2. False 3. Don’t know
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The motion diagram below shows an air puck moving in the positive x-direction. The images are taken at equal time intervals, and the first and last images show the puck at rest. Which of the curves below best shows the puck’s position as a function of time? 1.
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PY211_Clicker_Ch2 - Q2.1 An object moves along the x-axis...

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