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A crate of mass 20 kg is sliding across ...

A crate of mass 20 kg is sliding across a wooden floor. The coefficient of kinetic friction between the crate and the floor is 0.3.
Determine the magnitude of the friction force acting on the crate.

Text Solution

Verified by Experts

First draw a free- body diagram.

The normal force on the object balances the object's weight, so `F_(N)=mg=(20 kg)(10 m//s^(2))=200 N`. Therefore, `F_(f("kinetic"))= mu_(k) F_(N)=(0.3)(200 N)=60 N`.
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