Question: A 6 . 0 - k g block slides along a horizontal surface. If k = 0 . 2 0 for the block and surface,

A 6.0-kg block slides along a horizontal surface. If k=0.20 for the block and surface, at what rate is the friction force changing the mechanical energy of the block at an instant when its speed is 4.0ms?
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A 6 . 0 - k g block slides along a horizontal

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