Question

ASSERTION: a body is momentarily at rest but still some force is acting on it at that time

REASONING:- when a force is acting on a body, it might not have an acceleration​

Answer 1

Answer :-

Assertion :-

➛ If a body is momentarily at rest then v = 0 at that position , but this doesn't mean that force or acceleration are also necessarily zero at that position.

➛ For example, when a ball thrown upward reaches its maximum height, v=0 but the force continue to be its weight mg and the acceleration is g . Force is not always in the direction of motion.

➛ So , the Assertion is correct.

Reasoning :-

➛ Acceleration occurs when there is a net force on an object; no acceleration occurs when the net force is zero.

So , when a force is acting on a body, it might have some acceleration.

➛ So , the Reasoning is incorrect.

Answer 2

Answer:

Assertion is correct but Reasoning is incorrect.

Explanation:

ASSERTION:

• When a body is temporarily at rest, Zero velocity at that point, but this does not imply that force or acceleration are also zero at that point. When a ball is flung upward to its maximum height, Zero velocity, yet the force is still its weight mg, and the acceleration is g. The direction of force is not always the same as the direction of motion.

REASONING:

• When there is a net force on an item, acceleration happens; when the net force is zero, no acceleration occurs. As a result, when a force acts on a body, it may accelerate.