Two boxes are connected by a massless string across a massless frictionless pulley.  Box S has a mass M and box H has a mass m as shown. a) Do a free-body diagram for these objects. b) Write Newton's Second Law equation for these objects, horizontal component only for box S and vertical component only for box H. c) Solve algebraically for the acceleration of the boxes. d) Given M=8.4 kg and m=5.7 kg, use your equation from part c) to find the value of the acceleration. e) Use this answer to find the tension in the string.

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!