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A 20.0-kg box is pushed down an inclined plane (that is 30.0 o to the horizontal) by an external applied force of 50.0 N. It

A 20.0-kg box is pushed down an inclined plane (that is 30.0oto the horizontal) by an external applied force of 50.0 N. It accelerates down the incline at 1.50 m/s2. Calculate the force of kinetic friction acting on the box. Include a free-body diagram, an Fnet statement and a full solution. (5 marks)

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