Question

A monkey jumps from ground into the air. At the maximum height that it attains, which of the following is correct about its instantaneous velocity and acceleration?

• A. Both velocity and acceleration are non-zero.
• B. Velocity is zero but acceleration is non-zero.
• C. Velocity is non-zero but acceleration is zero.
• D. Velocity and acceleration both are zero.

Answer 1

The correct option is B Velocity is zero but acceleration is non-zero.

When the monkey reaches maximum height, then it changes its direction. Hence, at that instant the velocity becomes zero.
The acceleration due to gravity is still pulling the monkey down, which is non-zero.
Hence, at the maximum height, the velocity is zero but the acceleration is non-zero.