Answered: A 200-pound cube cargo of about 50…

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.50P: The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the...

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Question

A 200-pound cube cargo of about 50 centimeters on the side. The static coefficient is 0.4 and the dynamic is 0.2. Calculate the maximum acceleration of the car that keeps the box from moving.

Expert Solution

Step 1

Frictional force is defined as the force of resistance offered by the surface which opposes the motion of the object. It acts in the direction opposite to the motion. Normal reaction is the force exerted by the surface on the object in perpendicular to the surface. The relation between friction force and the normal force is expressed as,

$f = μ N$

Here, friction force is f, normal force is N and the coefficient of friction is $μ$ .

Friction in occurs in two different conditions which are static and dynamic conditions. The static friction on the object occurs when there is no displacement in the object with respect to time. Kinetic friction is considered when there is a change with respect to time.

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