# physics

A 100Kg stone is dragged 15m over a frozen lake. If the coefficient of friction between the stone and the ice is 0.1 and the whole process takes 8 seconds, how much work is done and how much power is required?

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1. Now wait a minute. Dr WLS showed you exactly how to do this with and arbitrary mass stone. Substitute 100 Kg for M and run your calculator.

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