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Chapter 6: Q.25 (page 155)

A stubborn, 120 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around the mule and pulls with his maximum force of 800 N. The coefficients of friction between the mule and the ground are ms = 0.8 and mk = 0.5. Is the farmer able to move the mule?

Short Answer

Expert verified

The farmer will not move the mule.

Step by step solution

01

Content Introduction

A force is a push or pull on an object caused by the interaction of the thing with another object. Every time two things interact; a force is exerted on each of them. The two items no longer feel the force after the interaction ends.

02

Content Explanation

We are given values wheremis mass,Fis maximum force,coefficientoffrictionμs,coefficientofgroundμk

m=120kgF=800Nμs=0.80μk=0.50

The graph so formed is

If ff > F, the farmer will not move the mule.

N=mgff=μsmgff=0.80×120kg×(9.81m/s2)ff=941.76Nff>F

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