In the arrangement shown in figure, pulley A and B are massless and the thread is inextensible. Mass of pulley C is equal to m. If friction in all the pulleys is negligible then,

(a) Tension in thread is 1/2 mg.

(b) Acceleration in pulley C is equal to g/2 downward.

(c) Acceleration of pulley A is equal to g/2 upward.

(d) Acceleration of pulley A is equal to 2g downward.

The correct answer is D!

Thanks in advance.

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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