Two boxes (Box A = 9.7 kg and Box B = 5.4 kg) are connected by a cord running over a pulley. The coefficient of kinetic friction between box A and the table is 0.18. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the tension of the cord while accelerating (in N), assuming the cord doesn’t stretch. As box B moves down, box A moves to the right. Hint: Solve for the acceleration of the system first.

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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: