AP EAMCET Engineering 20 Apr 2019 Shift 2 Paper

A one metre steel wire of negligible mass and area of cross-section 0.01 cm2 is kept on a smooth horizontal table with one end fixed. A ball of mass 1 kg is attached to the other end. The ball and the wire are rotating with an angular velocity of co. If the elongation of the wire is 2 mm. then ω is
(Young's modulus of steel = 2 × 1011Nm−2)