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Once a 26 kg crate is in motion on a horizontal floor, a horizontal force of 57 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s 2 . What is µk, the coefficient of kinetic friction, between the crate and the floor?

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Answer:

0.22

Explanation:

Coefficient of friction= F/R

But R=W=Mg=26*9.81=255.06

The horizontal force is 57N

Therefore

57/255.06= 0.22

The coefficient of friction is dimensionless.

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