5.2 An 800-N box is pushed up an inclined plane that is 4.0 m long. It requires 3200 J of work to get the box to the top of the plane, which is 2.0 m above the base. What is the magnitude of the average friction force on the box? (Assume the box starts at rest and ends at rest.
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Explanation:
W total =Wg +Wfriction
Here Wtotal is the total workdone in inclined plane or Wg is the workdone due to weight of the box and Wfriction is the workdone due to friction.
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