Question

B. E=GMm/R here full form of B. E is????

Answer 1

Answer:

We know that the magnitude of the gravitational force is given by:

F = -GmM/r2

Use the connection between force and potential energy to determine the general form of gravitational potential energy. U = mgh applies only for a uniform field, so it does not apply here where the field goes as 1/r2.

F = -dU/dr

ΔU = - ∫ F dr

This gives U = -GmM/r, if we define the potential energy to be zero at r = infinity. This is what we do - you are NOT free to define the zero anywhere you want - it is pre-defined to be zero at infinity.

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