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A crate of fruit with a mass of 31.0 kg and a specific heat capacity of...

A crate of fruit with a mass of 31.0 kg and a specific heat capacity of 3600 J/(kg?K) slides 7.60 m down a ramp inclined at an angle of 36.8 degrees below the horizontal.

If the crate was at rest at the top of the incline and has a speed of 2.05 m/s at the bottom, how much work Wf was done on the crate by friction?

Use 9.81 m/s2 for the acceleration due to gravity and express your answer in joules.

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