I need help with this practice problem. I was given the answer key but I don't understand how to solve it step by step.  A 5 kg object placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging 9 kg object. (a) Draw free-body diagrams of both objects. (b) Find the acceleration of the two objects and the tension in the string. Answers given in key: a.) diagram not given b.) 6.3 m/s2, 31.5 N

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