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7. You pull a 50 kg box across a level floor with a 100 N force at 30o above the horizontal for 12 m. How

7. You pull a 50 kg box across a level floor with a 100 N force at 30o above the horizontal for 12 m. How much work do you do?

8. A 20 kg block slides down a 20 m ramp inclined at 55o above the horizontal. The coefficient of kinetic friction is 0.30. a. Find the work done by gravity as it slides down the ramp. b. Find the work done by friction as it slides down the ramp

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