In a river 20 m width ,half part flows with speed 10m/s & remaining half flow at 20m/s as shown in figure.A man starts to swim from A & reach point B . Man swims at velocity V m at an angle therapy with line AB . Find the angle Theta. Man swims at constant speed in the same direction throughout the motion with respect to river.

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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