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## Homework Statement

A horizontal force of 20 N is required to move an object with a mass of 8 kg along a horizontal floor with constant velocity. Find the coefficient of kinetic friction.

## Homework Equations

f = uN

u = f/N

## The Attempt at a Solution

u = 20 N/(8 kg X 9.8 m/s2)

u = 20 N/78.4 N

u = 0.255 or 0.26

Is my answer correct? I'm confused with the mention of constant velocity. I know that one of the components of force is acceleration. Does it mean that acceleration is zero; therefore, there is no friction because velocity is constant?

f = 0 X 78.4 N

f = 0 ???

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