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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
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
Q2.5 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. Red 2. Blue 3. Green 4. Don’t Know y

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

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