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A pig enjoys sliding down a ramp. The farmer who owns the pig discovers that if...

A pig enjoys sliding down a ramp. The farmer who owns the pig discovers that if he greases the pig, there is no fiction and the pig enjoys the slide more (happy pig, better bacon). The required for the pig to reach the bottom of the slide with friction is twice the time without friction. Assumed the pig starts from rest.

Derive an expression for the coefficient of friction.

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