Find the position of a centre of mass of a system consisting of two bodies of mass 7kg and 14kg seperated by a distance of 70 cm from each other.

The gravitational force between two stones of mass 1 kg each separated by a distance of 1 me tre in vacuum is

Choose the correct options The centre of mass of a system of two uniform spherical masses of 5 kg and 35 kg with centres of them 0.7 m apart is

Calculate the potential energy of a body of mass 5 kg at a height of 2m from the ground.

Answer the following questions : Compare the gravitational force on a body of mass 1 kg due to the earth with the force on the same body due to another body of mass 1 kg at a distance of 1m from the first body. (Mass of the earth = 6xx10^24 kg, radius of the earth= 6400 km)

Two bodies of masses m and 2m are kept at distance r apart from each other. Then the value of G varies as

Find the gravitational potential energy of a body of mass 10 kg when it is at a height of 6400 km from the earth's surface. [M (earth) = 6xx 10^24 kg, R(earth) =6400 km]

If two objects of masses 500kg and 84kg resprecitvley are at a distance of 2m apart from each other.Find gravitational force between them?

Three identicle particle each of mass 1 kg are placed with their centres on a straight line. Their centres are marked A, B and C respectively. The distance of centre of mass of the system from A is.

A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is.. And on B is......

If the momentum of a body of mass 10 kg is 20 kg m//s , find its velocity.