Phil applies 100 N to a pulley system and raises a load one-tenth of his downward pull. Ideally, the weight of the load is

Question

Quizplus · Accepted Answer

According to the law of conservation of energy, the work input (Winput) equals the work output (Woutput). In other words, the amount of work done by Phil is equal to the amount of work done on the load. If Phil applies 100 N of force and raises the load one-tenth of his downward pull, then the load moves a distance of 10 times higher than Phil's distance of movement. Therefore, the work output is 10 times larger than the work input, making it Woutput = 1000 N. Therefore, the weight of the load is ideally 1000 N (B).

Phil Applies 100 N to a Pulley System and Raises