WBJEE 2013 Physics Solved Paper

A small mass m attached to one end of a spring with a negligi le mass and an unstretched length L, executes vertical oscillations with angular frequency ω0. When the mass is rotated with an angular speed ω by holding the other end of the spring at a fixedpoint, the mass moves uniformly in a circular path in a horizontal plane. Then the increase in length of the spring during this rotation is