Answer:
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.
Explanation:
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A spring that obeys Hooke's law has a spring force constant of 272 N/m. This spring is then stretched by 28.6 cm