Q2.

A man runs a race along a straight line starting with velocity v₀,

The direction of air appears to him to make an angle α with his course. It then appears to veer round uniformly from the initial angle to 2α during the race. If the air blows uniformly throughout at right angle to the course and if t be the time of the race, find the length of the course.

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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