Physics - Rotation Question with Solution | TestHub

The condition of slipping by particle from top is given by$\cos \theta =2/3$ From the figure, $h=r\cos \theta =21\times \frac{2}{3}=14\mathrm{m}$ Therefore, the required height at which the particle will leave the sphere is $=21+h=21+14=35\mathrm{m}$