1) What is the magnitude of the angular displacement of the minute hand of a clock in 20 minutes?
2) Obtain the relation between linear velocity and angular velocity in uniform circular motion.
3) A body of mass 1 kg is tied to a string and revolved in a horizontal circle of radius 1 m. What is the maximum number of r.p.m. made so that the string does not break?
[Breaking tension of the string is 9.86 N]