AP EAMCET Engineering 25 Apr 2017 Shift 1 Paper

A sphere of mass 4 kg is attached to one end of a steel wire of length 1 in and radius 1 mm. It is whirled in a vertical circle with an angular velocity 10 rad s−1. If the sphere is at the lowest point of its path, the elongation in the wire is_____(g=10ms2,Ysteel =20×1010Nm−2)