A bomb of mass 1 kg, thrown vertically upwards with a speed of u=100m/sec, explodes into two parts after t=5 secs. A fragment of mass m1= 400 g moves downwards with a speed v1= 25 m/sec, then speed v2 and direction of another mass m2 will be-

a) 40 m/s downwards b) 40m/s upwards c) 60m/s upwards d) 100m/s upwards

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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