A closed tank contains seawater up to 11.0 m high and air above water at a pressure of 3.00 atm. The water flows from a small hole at the bottom. Calculate the flow rate of water. Consider the area of the cross section of the tank much larger than that of the cross section of the hole.
The density of sea water is 1030 Kg / m3 and the acceleration of gravity g = 9,80 m / s2.

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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