What is magnitude of gravitational force between the earth and a 1 kg object on its surface ? Take mass of earth to be `6 xx 10^24 kg` and radius of the earth is` 6.4 xx 10^6 m.G =6.67 xx10^-11nm^2kg^-2`.

A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth ? Mass of the earth = 6.0 xx 10^24 kg , mean radius of the earth = 6.4 xx 10^6 m , G = 6.67 xx 10^-11 N m^2kg^-2 .

A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth’s gravitational influence? Mass of the satellite = 200 kg, mass of the earth = 6.0xxl0^24 kg , radius of the earth = 6.4 xx 10^6 m , G = 6.67 xx 10^11 N m^2kg^2 .

Calculate the force of gravitation between the earth and the sun, given the mass of earth = 6xx 10^24 kg and of the sun = 2 xx10^30 kg . Average distance between the two is 1.5xx 10^10m .

Find the mass of earth (Given the radius of earth R= 6.4 xx 10^6 m) .

Calculate the mass of the earth. Given radius of the earth =6.4xx10^-6 m and g = 9.8 m//s^2