ST 1:Two stones are simultaneously projected from level ground from same horizontal point with same speeds but different angles wuth horizontal.Both stones move in same vertical plane.Then the two stones may collide in mid air.

ST 2:For two stones simultaneously projected from same point with same speed at different angles with horizontal,their trajectories may intersect at some point.

Then state which st. is/are true/false and how? i.e proof.

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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