A 20-foot chain weighs 5 Ibs/ft is lying coiled on the ground. How much work is required to raise one end of the chain to a height of 20 so that it is fully extended. • 20 100x dx а. W = O b. None of the choices. О с. W = • 20 20x dx 20 d. W = 5x dx 20 е. W = (100 – 5x) dx

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