A box of bananas weighing 40.0 N rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.40, and the coefficient of kinetic friction is 0.20. Identify the following: If no horizontal force is applied to the box and the box is at rest, how large is the friction force exerted on the box? What is the magnitude of the friction force if a monkey applies a horizontal force of 6.0 N to the box and the box is initially at rest? What minimum horizontal force must the monkey apply to start the box in motion?

College Physics
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ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
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Chapter4: The Laws Of Motion
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Problem 16CQ: A crate remains stationary after it has been placed on a ramp inclined at an angle with the...
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A box of bananas weighing 40.0 N rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.40, and the coefficient of kinetic friction is 0.20.

Identify the following:

  1. If no horizontal force is applied to the box and the box is at rest, how large is the friction force exerted on the box?
  2. What is the magnitude of the friction force if a monkey applies a horizontal force of 6.0 N to the box and the box is initially at rest?
  3. What minimum horizontal force must the monkey apply to start the box in motion? 
  4. What minimum horizontal force must the monkey apply to keep the box moving at constant velocity once it has been started? 

*Choices attached in the photo

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