how much work is done in raising a stone of mass 5 kg and relative density 3 lying at the bed at the of a lake through height of 3 meter? (taking g = 10 10m/s square )?????

(a) 25 j (b) 100j

(c) 75j (d) none of the above....

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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