The angular velocity of the spring be

At

On Substituting these values in the above equation we get,

Velocity,

At

Again, on substituting these values in the above equation we get

Squaring and adding (1) and (2) we get,

The angular velocity of the spring be

At

On Substituting these values in the above equation we get,

Velocity,

At

Again, on substituting these values in the above equation we get

Squaring and adding (1) and (2) we get,