During a rockslide a 270kg rock slides from rest down, Ask an Expert

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During a rockslide, a 270kg rock slides from rest down ahillside that is 480m long and 300m high. The coefficent of kineticfriction between the rock and the hill surface is .21.

How much mechanical energy is dissipated by frictional forces during theslide?

How much mechanical energy is dissipated by the normal forceduring the slide down the hill?

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