Two boxes, one of mass 60 kg and the other 90 kg, are in contact and at rest on a surface where the coefficient of static friction between the boxes and the surface is 0.5. An 800-N pushing force is exerted on the 60 kg box toward the 90 kg box. a) Calculate the acceleration of the boxes (G.R.A.S.S). b) Calculate the magnitude of the action and reaction forces between the boxes. (G.R.A.S.S.)

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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: