A boulder is raised above the ground so that its potential energy relative to the ground is 200 J. Then it is dropped. What is the kinetic energy just before it hits the ground?
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Explanation:
W=gPE the work done on the bucket is equal to the Gravitational PE, so PE=100 J. A boulder is raised above the ground so that its potential energy relative to the ground is 200J. Then it is dropped. ... PE=KE, so 200J of PE is converted to 200 J of KE.
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