A spaceship of mass m1 moves in absence of external forces with a constant velocity of V. It starts ejecting a gas with velocity u which is constant relative to the spaceship and directed at right angles to the spaceship motion. the engine is shut down when mass of the spaceship decreases to m2. through what angle did the direction of the motion of spaceship deviate due to the jet engine operation.

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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