Work Problems. Chapter 14.1. In the equation for work, F is the___________ applied to the object and d is the _________ through which the force is applied. Force. DISTANCE. A boy lifts a 30N dragon 2 meters above the ground. How much work did the boy do on the dragon?. W= F x D
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W= F x D
W= 30N x 2m
Work = Force x Distance
Nothing moved so no work is done!
Suppose you want to calculate how much work it takes to lift a 160 N barbell. Besides the mass of the barbell, what other information do you need to know?
W = 700J
D = 2.60m
A 600 kg great white shark is lurking below an observation cage. His movement is being studied from a series of motion sensors below the boat. The shark leisurely charges the cage, strikes it and makes the cage rattle. Later, the shark returns for another run at the cage. The shark strikes the cage with 12,800 N of force. The shark traveled for 10 m in making its run. The cage is designed to withstand 124,500 J of “work” before it breaks. Should the man in the cage be worried?
F = 12800N
D = 10m
W= 12800N x 10m
W = 128000J