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 reverses its direction of motion.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation :

Assertion is true. At highest point when a body is projected vertically upwards, the velocity is zero but the acceleration due to gravity is not zero. After reaching the highest point. the body is momentarily at rest. It falls down in the reverse direction. Reason is therefore true.