**Equation of motion for rotation; Molecular rotations (as rigid bodies); Di and tri-atomic molecules; Precessional motion; top, gyroscope.**

Questions:

**Q 1**. A sphere of mass 0.5kg rolls on a smooth surface without slipping with a
constant velocity of 3.0 m/s. Calculate its kinetic energy (2021)

*with the vertical and a precessional angular speed of 2 rad/s. Calculate the angular speed with which it spins. (2019)*

Video Solution: