Question

For a Spring of constant K and mass (m) when attached at bottom of spring and is released it comes at the mean position.
Which of the following is true when mass is at the mean position.

• A. Acceleration = 0
• B. Acceleration = Max
• C. Velocity = 0
• D. Velocity = Max

Answer 1

Answer: (A), (D)

The correct options are
A Acceleration = 0
D Velocity = Max

At mean position $F=mg$

$kx=mg$

• Therefore net force will be zero.hence acceleration of block is zero.
• Above the mean position there is downward acceleration and down the mean position there is upward acceleration.
• There at mean position velocity is maximum.