then at what distance from centre of the earth

Three particles each of mass M are placed at the three corners of an equilateral triangle of side l. what is the force due to this system of particles on another particles of mass m placed at the midpoint of any side? If the distance between centres of the earth and the moon is d [...]

Two satellites A and B of the same mass are revolving around the earth in the concentric circular orbits such that the distance of satellite B from the centre of the earth is thrice as compared to the distance of the satellite A from the centre of the earth. The ratio of the centripetal force [...]

The value of g at a particular point is 10 m/s^2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be If the [...]

If the distance between centres of the earth and the moon is d and the mass of the earth is 81 times the mass of the moon, then at what distance from centre of the earth, the gravitational field will be zero? If the distance between centres of the earth and the moon is d [...]