Question

derive an expression for potential energy of an object of mass m raised to a height h from the ground

Answer 1

Let the work done on the object against gravity = W Work done, W = force × displacement Work done, W = mg × h Work done, W = mgh Since workdone on the object is equal to mgh, an energy equal to mgh units is gained by the object . This is the potential energy (Ep) of the object. Ep = mgh

Answer 2

Let the work done on the object against gravity = W Work done, W = force × displacement Work done, W = mg × h Work done, W = mgh Since workdone on the object is equal to mgh, an energy equal to mgh units is gained by the object . This is the potential energy (Ep) of the object. Ep = mgh