Physicshard · Past Paper
If the momentum of a body is increased by 100%, its kinetic energy will increase by:
A100%
B200%
C300%
D400%
✓ Correct Answer: C — 300%
KE = p^2/2m. If p becomes 2p (100% increase), KE becomes (2p)^2/2m = 4KE. The increase is 4KE - KE = 3KE, which is 300%.
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