A uniform cube of side b and mass M rest on a rough horizontal table.A horizontal force F is applied normal to one of the face at the point ,at a height 3b/4 above the base .what should be the coefficient of friction (μ) between cube and table so that is will tip about edge before it starts slipping ?

(you can see attached image if needed)

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.

11

21

31

41