A body is raised to a height h above the ground. What is the gain in its potential energy?
What assumptions have you made to arrive at your answer?
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Work done against gravity in lifting an object becomes potential energy of the object-Earth system. The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity.
An example of an assumption is that there will be food at a party. Assumption is defined as the act of taking on new responsibilities. An example of assumption is the fulfillment of the duties of another person who has been fired from your company.
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