a plane, diving at an angle of beta withthe vertical, releases a projectile at an altitude of 730m. The projectile hits the ground 5.0s after it was released, having travelled a horizontal distance of 900m. (i) calculate the speed of the plane when the projectile was released and the angle beta? (ii) what were the speed and direction of the projectile just before hitting the ground?

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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