ch02-QZ - Assuming there is no wind, which one of the...

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Cutnell/Johnson Physics 8th edition Classroom Response System Questions Chapter 2 Kinematics in One Dimension Interactive Lecture Questions

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2.7.3. Consider the graph the position versus time graph shown. Which curve on the graph best represents a constantly accelerating car? a) A b) B c) C d) D e) None of the curves represent a constantly accelerating car.
2.7.4. Consider the graph the position versus time graph shown. Which curve on the graph best represents a car that is initially moving in one direction and then reverses directions? a) A b) B c) C d) D e) None of the curves represent a car moving in one direction then reversing its direction.

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2.6.1. Two identical ping-pong balls are selected for a physics demonstration. A tiny hole is drilled in one of the balls; and the ball is filled with water. The hole is sealed so that no water can escape. The two balls are then dropped from rest at the exact same time from the roof of a building.
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Unformatted text preview: Assuming there is no wind, which one of the following statements is true? a) The two balls reach the ground at the same time. b) The heavier ball reaches the ground a long time before the lighter ball. c) The heavier ball reaches the ground just before the lighter ball. d) The heavier ball has a much larger velocity when it strikes the ground than the light ball. e) The heavier ball has a slightly larger velocity when it strikes the ground than the light ball. 2.6.3. A cannon directed straight upward launches a ball with an initial speed v . The ball reaches a maximum height h in a time t . Then, the same cannon is used to launch a second ball straight upward at a speed 2 v . In terms of h and t , what is the maximum height the second ball reaches and how long does it take to reach that height? Ignore any effects of air resistance. a) 2 h, t b) 4 h, 2 t c) 2 h, 4 t d) 2 h, 2 t e) h, t...
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ch02-QZ - Assuming there is no wind, which one of the...

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