Two sprinters A and B of mass 70kg and 55kg respectively are running with the same speed in the same direction. Which of the following is not true?

1) A has a greater kinetic energy

2) Greater force is needed to stop A

3) The momentum of A is greater than B

4) B will finish the race before A

5) B has greater kinetic energy

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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