If the velocity of an object doubles, its kinetic energy:
AStays the same
BHalves
CBecomes 4 times
DDoubles
Answer & Solution
Correct answer: C. Becomes 4 times
KE = ½mv². Doubling v makes v² four times larger, so KE quadruples. This is why driving twice as fast carries 4× the energy in a crash — and why braking from 80 km/h needs 4× the stopping energy of braking from 40 km/h.
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