A 25-kg block is initially at rest on a horizontal surface, and a horizontal force of 75.0 N is required to set the block in motion after which a horizontal force of 60.0 N is required to keep the block moving with constant speed. Find (a) the coefficient of static friction and(b) the coefficient of kinetic friction between the block and the surface. A 25-kg block is initially at rest on a horizontal surface, and a horizontalforce of 75.0 N is required to set the block in motion after which ahorizontal force of 60.0 N is required to keep the block moving withconstant speed. Find (a) the coefficient of static friction and (b) thecoefficient of kinetic friction between the block and the surface.

Given: m=25 kg To determine: Static and kinetic friction

Answered: the coefficient of static friction and…

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the coefficient of static friction and (b) the coefficient of kinetic friction between the block and the surface.

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 7.48P: Find the smallest distance d for which the hook will remain at rest when acted on by the force P....

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Question

A 25-kg block is initially at rest on a horizontal surface, and a horizontal force of 75.0 N is required to set the block in motion after which a horizontal force of 60.0 N is required to keep the block moving with constant speed.

Find

(a) the coefficient of static friction and

(b) the coefficient of kinetic friction between the block and the surface.

A 25-kg block is initially at rest on a horizontal surface, and a horizontal
force of 75.0 N is required to set the block in motion after which a
horizontal force of 60.0 N is required to keep the block moving with
constant speed. Find (a) the coefficient of static friction and (b) the
coefficient of kinetic friction between the block and the surface.

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