What is precession ? 

What is the total momentum of the system of particle ? 

In motion of spinning top at any one place, whether the point in spinning top remains stationary or line remains stationary? 

"A particle has point volume". True of False ? 

Which forces needed for the rotational motion about a fixed axis ?

A uniform solid cylinder of mass $M$ and radius $R$ rotates about a frictionless horizontal axle. Two similar masses suspended with the help two ropes wrapped around the cylinder. If the system is released from rest then the acceleration of each mass will be