Physicshard · Past Paper
Percentage increase in KE when velocity is increased by 50% is:
A50%
B100%
C125%
D225%
✓ Correct Answer: C — 125%
KE is proportional to v^2. If v becomes 1.5v, KE becomes (1.5)^2 = 2.25 times. The increase is (2.25 - 1) = 1.25 or 125%.
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