Statement of a problem № 41954


A student tries to raise a chain consisting of three identical links. Each link has a mass of 300 g. The three-piece chain is connected to a string and then suspended vertically, with the student holding the upper end of the string and pulling upward. Because of the student s pull, an upward force of 12 N is applied to the chain by the string. (a) Draw a free-body diagram for each of the links in the chain and also for the entire chain considered as a single body. (b) Use the results of part (a) and Newton s laws to find (i) the acceleration of the chain and (ii) the force exerted by the top link on the middle link.

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