Physics - Circular Motion Question with Solution | TestHub

What should be the velocity of earth due to rotation about its own axis so that the weight at equator becomes ${\left(\frac{3}{5}\right)}^{\text{th }}$ of initial value? (Radius of earth on equator $=6400\mathrm{km},\mathrm{g}=10\frac{\mathrm{m}}{{\mathrm{s}}^2},\cos 0^{\circ }=1$ )