Awooden box weighing 150 n is sliding at a constant rate over a concrete sidewalk. the force required to pull the box at a steady rate is 78 n. what is the coefficient of friction?

a. 1.9
b. 228
c. 72
d. 0.52

D

Explanation:

Given

Force required to move a box at steady rate is F=78 N

Weight of Block W=150 N

If the block is moving at a steady rate then net Force acting on it is zero

Applied Force must balance the Friction force

where N=normal Reaction

Normal reaction must be equal to weight

report!

explanation:

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