a ball of mass 0.2 kg rests on a vertical post of length 5m.

a bullet of mass 0.01 kgtravelling with a vel v m/s in horizonal direction,hits center of ball

after collision bullet and ball travell seperately

ball hits ground at dist of 20m from post and bullet at 100m from post

then find initial velocity of the bullet?

A)250

B)250*(2)^1/2

C)400

D)500

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.

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