Question

Assertion :A body can have acceleration even if its velocity is zero at a given instant of time. Reason: A body is momentarily at rest when it reverse its direction of motion.

• A. Both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
• B. Both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.
• C. Assertion is true, but the Reason is false.
• D. Assertion is false, but the Reason is true.

Answer 1

The correct option is A Both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

For eg: When a ball is released from point $A_1$ it strikes B on ground. During the moment instantaneous velocity, $\frac{d\overrightarrow{v}}{dt}=0$ but a constant acceleration due to gravity acts continuously $\left(\overrightarrow{g}\right)$ downwards.

Hence, option A is correct.