A steady stream of water falls straight down from a pipe. Assume the flow is incompressible. At a distance d₁ beneath the pipe the speed of the falling water is 1.0 m/s. At a distance d₂ beneath and pipe the speed of the falling water is 2.0 m/s. What is the ratio of the cross section of the flow at height d₁ to the cross section at height d₂ ?

(A) 4:1 (B) 2:1

(C) 1:2 (D) 1:4

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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