1. Two cars A & B are moving in same direction with velocities 30m/s & 20m/s.When car A is at a distance d behind the car B,the driver of the car A applies brakes producing uniform retardation of 2m/s2.When there will be no collision???
2. A taxi leaves the station X every 10min.Simultaneously,a taxi leaves the station Y also for station X every 10min.The taxis move at the same constant speed and go from X to Y or vice-versa in 2hrs.how many taxis coming from the other side will each taxi meet enroute from Y to X??

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.

11

21

31

41