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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 7 - Gravitation > 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. 0×10^24 kg; radius of the earth =6.4 x 10^6 m, G = 6.67 x 10^11 N-m^2/Kg^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. 0×10^24 kg; radius of the earth =6.4 x 10^6 m, G = 6.67 x 10^11 N-m^2/Kg^2.

How will you 'weigh the sun' that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5×10^8 km.