   Chapter 4, Problem 26P

Chapter
Section
Textbook Problem

A man exerts a horizontal force of 125 N on a crate with a mass of 30.0 kg. (a) If the crate doesn’t move, what’s the magnitude of the static friction force? (b) What is the minimum possible value of the coefficient of static friction between the crate and the floor?

(a)

To determine
The magnitude of static friction force.

Explanation

Given info: The mass of the crate is 30.0 kg. The force applied on the crate is 125 N.

The free body diagram is given below.

From the diagram,

Fs=F

• Fs is the static friction force

(b)

To determine
The minimum possible value of the co-efficient of static friction.

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