Physics

Problem

The rotation of the Earth having radius R about its axis speeds upto a value such that a man at latitude angle

60^\circ

feels weightless. The duration of the day in such case will be (A)

8\pi\sqrt{\frac{R}{g}}

(B)

8\pi\sqrt{\frac{g}{R}}

(C)

\pi\sqrt{\frac{R}{g}}

(D)

4\pi\sqrt{\frac{g}{R}}