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December 21, 2014

Homework Help: physics

Posted by jess on Friday, October 8, 2010 at 7:06am.

A 715 kg object is lifted from the surface of the earth to a height of 880 kg above the surface of the earth.

Calculate the increase in gravitational potential energy using the exact expression and compare it with the approximate expression using g=9.81. Give the magnitude of the difference between the two expressions divided by the exact result (that is the relative error) as your answer. Use 6.0x10^24 kg, 6.4x10^6 m and 6.67x10^-11 for the earth mass, earth radius and the Gravitational Constant G, respectively.

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