alleryThe gravitational potential energy of a body of mass m at height h near the Earth's surface (taking surface as reference) is:
AU = m g h
BU = ½ m g h
CU = m g h²
DU = m g / h
Answer & Solution
Correct answer: A. U = m g h
1. Work done against gravity to raise the body from the surface to height h is W = m g h.
2. This work is stored as gravitational PE since gravity is conservative.
3. U(h) = m g h with U(0) = 0.
_Source: syllabus Physics Ch 5, §5.6 Potential Energy, p. 81_
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