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10 November, 14:33

How work done against gravity can be expressed?

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  1. 10 November, 17:21
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    If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh. We define this to be the gravitational potential energy (PEg) put into (or gained by) the object-Earth system.
  2. 10 November, 17:51
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    The work done against the gravitational force goes into an important form of stored energy that we will explore in this section ... If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh.
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