a block of mass 100g is moved with a speed of 5 m/s at the highest point in a closed circular tube of radius 10cm kept in a vertical plane. the cross section of tube is such that the block just fits in it. the block makes several ossilations inside the tube and finally stops at thelowest point. find the work done by the tube on the block during this process

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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