Question

At the maximum height of a body thrown vertically up

• A. Velocity is not zero but acceleration is zero
• B. Acceleration is not zero but velocity is zero
• C. Both acceleration and velocity is zero
• D. Both acceleration and velocity are not zero.

Answer 1

Answer: (B)

Acceleration is not zero but velocity is zero

Answer 2

At the maximum height reached, the body comes to rest and thus its velocity becomes zero while the acceleration due to gravity ($g=9.8\, m/s^2$ ) acting on it continues to act in downward direction and tries to bring the body back to the ground. Thus at maximum height, the acceleration of the body is non-zero but its velocity is zero.