A wheel of mass100kg and radius of gyration is 2m has a constant acceleration of 3rad/ sec² during a certain 4sec interval it turns through an angle of 120°rad.Assuming that wheel started from rest.How long was it in motion at the start of this 4sec interval.Find torque on wheel,kinetic energy during 4sec interval.

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11

21

31

41