Question

Assertion (A): An object can have acceleration even if its velocity is zero at a given instant of time.

Reason (R): An object thrown vertically upwards is momentarily at rest at the highest point

of its path.

4. Assertion (A): Displacement of an object may be zero when the distance travelled by it is not

zero.

Reason (R): The displacement is the shortest distance between the initial and final positions

of an object.

5. Assertion (A): An object can have constant speed but variable velocity.

Reason (R): In a uniform circular motion, speed remains unchanged



physics master pls reply ​

Answer 1

Answer:1.The velocity of the body thrown vertically up is zero at its highest point whereas the acceleration of the body continues to act in the downward direction. Thus at that instant, the body has acceleration while its velocity is zero.

Also at the highest point, the body reverses its direction. Hence numerically, the body is at rest when it reverses its direction.

2.Assertion displacement of an object may be zero even if the distance covered by it is not zero reason displacement is the shortest distance between the initial and final position

Solution : The displacement is the shortest distance between initial and final position. When final position of a body coincides with its initial position, displacement is zero, but the distance travelled is not zero.

3.The assertion is correct and the reason is the correct explanation of the assertion.

hope it helps u

Explanation: