PL explain: A ball rolls of the of the top of a stairway with a horizontal velocity of magnitude of 1.8 ms-1. The steps are 0.2 m high and 0.2 m wide. Which steps will the ball hit first ( g= 10m/S2).Answer choice A) 3rd B) 4th C) 5th D ) 6th

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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