A block of base 10 cm*10 cm and height 15 cm is kept on an inclined plane.The coeffecient of friction between them is 3^1/2. The inclination α of this inclined plane from the horizontal plane is gradually increased from 0 degree.Then,

a) at α=30, the block will start sliding down the plane.

b) the block will remain at rest on the plane up to certain α and then it will topple

c) at α=60, the block will start sliding down the plane and continue to do so at higher angles

d) at α=60, the block will start sliding down the plane and on further increasing α ,it will topple at certain α

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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