Physicshard · Past Paper
If the mass of an object is doubled and its velocity is halved, what happens to its kinetic energy?
ARemains same
BIs doubled
CIs halved
DIs quadrupled
✓ Correct Answer: C — Is halved
KE = 1/2 * (2m) * (v/2)^2 = 1/2 * 2m * v^2/4 = 1/2 (1/2 mv^2). Thus, it becomes half of the original kinetic energy.
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