A uniform rod of mass M and length L is kept on horizontal table with L / 4 length on the table as shown in figure. As the string attached to the end B is cut, the angular acceleration of the rod about point C will be:

1)3g/7L

2)12g/7L

3)4g/5L

4)9g/7L

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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