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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A horizontal force of 95.0 N is applied to a 60.0-kg crate on a rough, level surface. If the crate accelerates at 1.20 m/s2, what is the magnitude of the force of kinetic friction acting on the crate?

To determine
The magnitude of force of kinetic friction on the crate.

Explanation

Given info: The mass of the crate is 60.0 kg. The magnitude of applied horizontal force is 95.0 N. The acceleration of the crate is 1.20ms2 .

The object is acted upon by four forces – applied force, force of kinetic friction, normal force, and the weight of the crate. The free body diagram is given below.

From the above diagram,

ma=FFk

  • m is the mass of the block.
  • a is the acceleration.
  • F is the applied force.
  • Fk is the force of kinetic friction.

On re-arranging,

Fk=Fma

Conclusion:

Substitute 60

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