Question

Assertion (A): If momentum of a body is doubled, its kinetic energy becomes
four fold.
Reason (R): Kinetic energy is proportional to square of momentum.​

Answer 1

Answer:

I think both (A) and (R) are correct and (R) is the correct explanation of (A).

sorry if this is wrong is was just a guess

Answer 2

Answer:

Both A and R are correct and R is correct explanation of A

Explanation:

Momentum of a body of given mass, is directly proportiional to its velocity. In fact momentum is mass multiplied by velocity.

Kinetic energy of a body of given mass, is directly proportiional to its square of its velocity.

When momentum is doubled, mass remaining constant, this means velcity is doubled.

Hence, kinetic energy becomes 2^2= 4times