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A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its...

A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its speed is 7 m/s. To the nearest Joule, what was the magnitude of the work done by friction?

B) If the slope in the above problem is 43 degrees, what is the coefficent of friction (to 2 decimal places)?

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