Question

Assertion: If the momentum of a body increases by 20 %, then its K.E also increases by 20 %.
Reason: The K.E of a body is directly proportional to the square of its momentum

• A. Both Assertion and Reason are correct and Reason is the correct explanation for the Assertion
• B. Both Assertion and Reason are correct but the Reason does not give the correct explanation
• C. Assertion is true but the Reason is false
• D. Assertion is false but the Reason is true

Answer 1

The correct option is D Assertion is false but the Reason is true

$KE=p^2/2m$
Therefore $p$ increases by 20% implies KE increases by 44%.