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September 22, 2014

Homework Help: physics

Posted by Amy on Monday, February 13, 2012 at 11:03pm.

A person is riding on a Ferris wheel of radius R. He starts at the lowest point of the wheel. When the wheel makes one complete revolution, is the net work done by the gravitational force positive, zero, or negative?
Do you need to know how the speed of the person changed before you can answer the question?

Suppose he started at the highest point of the wheel. What is the net work done by the gravitational force when he reaches the lowest point?

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