A student tries to raise a chain consisting of three identical links. Each link

Question

A student tries to raise a chain consisting of three identical links. Each link has a mass of 320g. 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 12N is applied to the chain by the string. Use Newton's laws to answer the following questions. Find the acceleration of the chain. Express your answer using two significant figures. Find the force exerted by the top link on the middle link. Express your answer using two significant figures.

Explanation / Answer

oh sorry for the wrong answer. (1)net mass of the chain=320*3 =960 grams. so, T-mg=ma or 12-9.408=0.96 a or a=2.7 m/s^2. (2)the net force=m(g+a) =0.64(9.8+2.7) =8N

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