An overhead garage door has two springs, one on each side of the door. A force of 16 pounds is required to stretch each spring 1 foot. Because of the pulley system, the springs stretch only one-half the distance the door travels. The door moves a total of 16 feet and springs are at their natural length when the door is open. Find the work done by pair of strings.
A) 512 ft-lb
B) 1,024 ft-lb
C) 8,192 ft-lb
D) 4,096 ft-lb
E) 2,048 ft-lb

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The Answer of An overhead garage door has two springs, one on each side of the door. A force of 16 pounds is required to stretch each spring 1 foot. Because of the pulley system, the springs stretch only one-half the distance the door travels. The door moves a total of 16 feet and springs are at their natural length when the door is open. Find the work done by pair of strings.
A) 512 ft-lb
B) 1,024 ft-lb
C) 8,192 ft-lb
D) 4,096 ft-lb
E) 2,048 ft-lb

An Overhead Garage Door Has Two Springs, One on Each