why the gravitational potential energy is negative?

Asked by Sneha Kashyap | 24th Nov, 2013, 01:26: PM

Expert Answer:

Gravitational potential energy is negative at the surface of Earth, because work is done by the gravitational field in bringing a mass from infinity i.e work has to be done on a body, if it is taken away from the gravitational field of the earth. Thus, potential energy is negative.
For example, when a rocket is sent to space, work is done using fuels.

Answered by Faiza Lambe | 24th Nov, 2013, 03:32: PM

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