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In the Atwood machine shown below, m1 = 2.00 kg and m2 = 6.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at vi = 2.60 m/s downward.

(a) How far will m1 descend below its initial level?

(b) Find the velocity of m1 after 1.80 s.

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