Per NCERT, if the SPEED of an object DOUBLES (while its mass stays the same), how does its KINETIC ENERGY change?
AIt halves
BIt stays the same
CIt becomes FOUR times (since KE ∝ v²)
DIt doubles
Answer & Solution
Correct answer: C. It becomes FOUR times (since KE ∝ v²)
Per NCERT, KE = ½mv². Doubling v gives KE proportional to (2v)² = 4v² — so KE becomes 4 times. The other options miss the squared dependence.
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