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# Both masses start from rest at the same height

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Unformatted text preview: same height. However, one ramp is steeper than the other. If the masses are released, which one is going faster when it reaches the bottom of its ramp? A. The one on the steeper ramp. B. The one on the less steep ramp. C. The masses have the same speed. D. The answer cannot be determined. E. Not covered in the assigned reading. A 200-g mass hung from the end of a spring causes it to stretch 5.0 cm after it comes to rest. If another 200-g mass is hung from the spring, the potential energy of the spring after the mass comes to rest will be A. the same. B. twice as much. C. three times as much. D. four times as much. E. Not covered in the assigned reading. You throw a ball straight up. The work done by gravity on the ball while the ball moves upward is __________ and the work done by gravity on the ball while the ball moves downward is __________ A. positive, positive. B. positive, negative. C. negative, positive. D. negative, negative. E. Not covered in the assigned reading. A car is stopped at a red light. When the light turns green, the car speeds up as it drives up a hill. 10000 J of gasoline is used up as it moves. The kinetic energy of the car at the top of the hill is 2000 J. The potential energy of the car when it gets to the top of the hill is 2000 J. How much heat energy is produced during as the car moves? A. 10000 J B. 2000 J C. 6000 J D....
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## This note was uploaded on 08/29/2010 for the course PHYS 38234 taught by Professor Ramesh during the Spring '09 term at Berkeley.

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