1.two identical balls are shot upwards one after the other at an interval 2 sec along the same vertical line with same initial velocity of 40 m/s. What is the height at which balls collide?

a)50m b)75m c)100m d)125m

2. A football is kicked vertically upward from the ground and a person gazing out of window sees it moving upwards past him at 5 m/s.Window is 15m above the ground.Ignore air resistance And take g=10.

How high does the ball go above ground? and how much time does it take to go from ground to highest point?

3. Can you tell me name of any publisher or author for solutions of HC Verma and DC Pandey?

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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