a 5 kg box initially at rest slides down a ramp with friction acting on the box. at the top of the ramp the box has a potential energy of 120 j. at the bottom, its kinetic energy is 100 j. what was the amount of work done by friction along the ramp ? group of answer choices 100 j 150 j 120 j 20 j

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02-11-2022
Physics

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a 5 kg box initially at rest slides down a ramp with friction acting on the box. at the top of the ramp the box has a potential energy of 120 j. at the bottom, its kinetic energy is 100 j. what was the amount of work done by friction along the ramp ? group of answer choices 100 j 150 j 120 j 20 j

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