For spherical mass m falling in liquid a force continuously acts upon it which tries to impede its motion the force is known as viscous force this force is seen to depend upon velocity of falling object coefficient of viscosity of liquid radius of spherical mass. By using dimensions derive relation for viscous force??

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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