A potential-energy function is given by U = C/x, where

A potential-energy function is given by U = C/x, where C is a positive constant.
(a) Find the force Fx as a function of x.
(b) Is this force directed toward the origin or away from it?
(c) Does the potential energy increase or decrease as x increases?
(d) Answer parts (b) and (c) where C is a negative constant.



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