Chapter 6-w-key - Chapter 6 Conservation of Energy 2. A...

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Chapter 6 Conservation of Energy 2. A 20.0 N force is applied at an angle of 40.0 degrees above the horizontal to a 4.00 kg box. The box moves a horizontal distance of 4.00 meters. The work done by the 20.0 N force is: A. 75.0 J. B. 61.3 J. C. 50.1 J. D. 46.3 J. E. 40.5 J 3. A 30.00 kg box slides up a 12.00 meters long incline at an angle of 30.00 degrees above the horizontal. The change in gravitational potential energy is: A. 2110 J. B. 1467 J. C. 1080 J. D. 1764 J. E. 760.0 J. 5. A horizontal force is applied to a 4.0 kg box. The box starts from rest moves a horizontal distance of 8.0 meters and obtains a velocity of 6.0 m/s. The system is frictionless. The horizontal force is: A. 3.0 N. B. 5.0 N. C. 7.0 N. D. 9.0 N. E. 11 N. 10. As a hiker descends a hill, the work done by gravity on the hiker is: A. positive and depends on the path taken. B. negative and depends on the path taken. C. positive and independent of the path taken.
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This note was uploaded on 03/01/2009 for the course PHY 2130 taught by Professor Rehse during the Winter '08 term at Wayne State University.

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Chapter 6-w-key - Chapter 6 Conservation of Energy 2. A...

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