Question: A 750.0-kg boulder is raised from a quarry 125 m deep by a long uniform chain having a mass of 575 kg. This chain is

A 750.0-kg boulder is raised from a quarry 125 m deep by a long uniform chain having a mass of 575 kg. This chain is of uniform strength, but at any point it can support a maximum tension no greater than 2.50 times its weight without breaking.
(a) What is the maximum acceleration the boulder can have and still get out of the quarry, and
(b) How long does it take to be lifted out at maximum acceleration if it started from rest?

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