If you are to drive 300km to an interview. The interview is at 11:15am then you plan to drive at 100km/h, so you leave at 8:00am to allow some extra time. You drive at the speed for the first 100km, but then construction work forces you to slow to 40km/h for 40km. What would be the least speed needed for the rest of the the trip so as to arrive in time for the interview.

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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