A steel girder weighing 200 lb is hoisted from ground level to the roof of a 40-ft building using a chain that weighs 5 lb/running foot. Find the work done.
A)4,000 ft-lb
B)8,100 ft-lb
C)12,000 ft-lb
D)8,000 ft-lb

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The Answer of A steel girder weighing 200 lb is hoisted from ground level to the roof of a 40-ft building using a chain that weighs 5 lb/running foot. Find the work done.
A)4,000 ft-lb
B)8,100 ft-lb
C)12,000 ft-lb
D)8,000 ft-lb

A Steel Girder Weighing 200 Lb Is Hoisted from Ground