4. You are lowering two boxes, one on top of the other, down the ramp as shown in the figure bypulling on a rope parallel to the surface of the ramp. Both boxes move together at a constantspeed of 15.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is0.444, and the coefficient of static friction between the two boxes is 0.800. What is the magnitudeof the friction force on the upper box?2.50m4.75 m

Concept: The Schematic diagram for the Upper box is From the diagram, we can see that Frictional…

Answered: You are lowering two boxes, one on top…

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