PHC5Quizzes

# D four times as much e 141 times as much a 10 kg mass

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1.41 times as much. A 10-kg mass is sliding on a frictionless surface to the right with a speed of 4 m/s. How much work would be required to reverse the direction of the mass so that it moves to the left with a speed of 4 m/s? A. +160 J B. +80 J C. 0J D. -160 J E. -80 J Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5 min longer. The wall doesn't move. Compare the work they do on the wall. A. Joel does 50% more work on the wall than Jerry. B. Jerry does 50% more work on the wall than Joel. C. Joel does 75% more work on the wall than Jerry. D. Neither of them do any work on the wall. E. None of these are correct. 4. 5. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 6. 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. 0J E. 8000 J Two identical balls, A and B, are each carried to height h at different constant velocities. Ball B rises twice as fast as ball A. The work the gravitational force...
View Full Document

## This note was uploaded on 08/29/2010 for the course PHYS 38234 taught by Professor Ramesh during the Spring '09 term at Berkeley.

Ask a homework question - tutors are online