A cart weighing 200N can roll without friction along a horizontal path.The cart carries a block weighing 20N. The co efficient of friction between the block and cart is 0.25.
a) when a force of 2N is applied to the block then
1) force of friction between block and cart
2) acceleration of the block and cart
b)when a force of 20N is applied to the block then
1) force of friction between block and cart
2) acceleration of the block and cart

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