Mary pushes a her sister down a hill in a cardboard box. The total mass of the box and child is 115 kg. The box starts at rest at the beginning of the incline. The hill is at an incline of 28 degrees with respect to the horizontal.The static and kinectic friction between the box and hill is ?? = 0.4 and ?? = 0.2. a. What is the magnitude of the friction force acting on the box? b. What is the magnitude of the net force acting on the box and child system? c. Will the block slide down the hill, or stay at rest?

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  Mary pushes a her sister down a hill in a cardboard box. The total mass of the box and child is 115 kg. The box starts at rest at the beginning of the incline. The hill is at an incline of 28 degrees with respect to the horizontal.The static and kinectic friction between the box and hill is ?? = 0.4 and ?? = 0.2.

a. What is the magnitude of the friction force acting on the box?
b. What is the magnitude of the net force acting on the box and child system?
c. Will the block slide down the hill, or stay at rest?

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