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# A2 gravitational fields question. watch

1. Hi,

In the question you had to say what affect doubling the mass would have on the potential energy and the potential using the equation Ep=Vm. I got that doubling the mass will double the potential energy but I don't understand why doubling the mass while leave the potential unchanged. Is it something to do with potential being the work done per unit mass?

Please could someone explain this to me? Thanks
2. (Original post by VioletPhillippo)
Hi,

In the question you had to say what affect doubling the mass would have on the potential energy and the potential using the equation Ep=Vm. I got that doubling the mass will double the potential energy but I don't understand why doubling the mass while leave the potential unchanged. Is it something to do with potential being the work done per unit mass?

Please could someone explain this to me? Thanks
Gravitational potential is by definition the gravitational potential energy per unit mass. In other words, it is independent of mass.

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