Question

Assertion: If the velocity of a body is tripled, then K.E. becomes 9 times.

Reason : Kinetic energy , K.E.=mv2/2​

Answer 1

Answer:

Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer 2

Assertion and Reason are correct and Reason is the correct explanation.

• Let initial velocity be v and mass be m. So, kinetic energy will be : KE = ½ mv².

• Now, new velocity is 3v . So, new kinetic energy is : KE = ½m(3v)² = 9 × mv²/2 = 9KE.

• So, new KE will become 9 times the initial KE.

• This is because Kinetic Energy is proportional to v² factor (velocity²).

$\star$ Hope It Helps.