alleryIf 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.
Keep practising Work and Energy
Browse all Work and Energy questions for CBSE Class 9, or explore more Science topics.
Related questions
Match each energy transformation with its representative apparatus:Match each power and energy commercial unit with its value:Match each work calculation with its sign and meaning:Match each mechanical energy form with its algebraic formula:Work and energy bingoPick the right unitComplete the energy ruleWork and energy numbers