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what i remeber was that the object is in a staionary position 10000 km away from the centre of a planet, to move the object from the centre of the planet to a stationary position 20000km from the centre of the planet requires 1 Mj. how much more work would be required to move the object from the...

does anyone know how to answer the question? i know you have to use W = Fs but how do you work out the new force required for the larger displacement? can anyone help? or is this just a bullshiz question that no one can do (no one seemed to able to do it at killara...)

yeah we got the same result... i think you are right