You are lowering two boxes, one on top of the other, down a ramp by pulling on a rope parallel to the surface of the ramp. Both blocks move with constant velocity of 15.0 [ ? ? ]. The coefficient of kinetic friction between the ramp and the lower box is 0.444 and the coefficient of static friction between the two boxes is 0.800. Determine the angle at which the top block will start to slide down the bottom block.

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: