A body of mass 1 kg is fastened to one end of a steel wire of cross- section area `3 xx 10^(-6)m^(2)` and is rotated in horizantal circle of radius 20 cm with a constant speed `2 m//s`. Find the elongation of the wire `(Y= 2 xx 10^(11) N//m^(2))`

Options

A. `0.33 xx 10 ^(-5)m`
B. `0.67 xx 10 ^(-5) m`
C. `2 xx 10 ^(-5) m`
D. `4 xx 10^(-5)`

Answer

B