1. The 2 ends of a spring balance are pulled each by a force of 10 kgwt. What will be the reading of the spring?

2. How much below the surface of the earth does the acceleration due to gravity is 10% of its value at the earth's surface ? R = 6400 km = Radius of earth.

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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