About Planet Pluto | Prafull Billore | MBA CHAI WALA

The distance of Pluto from the sun is 40 times the distance of earth. If the masses of earth and Pluto be equal, what will be ratio of gravitational forces of sun on these planets ?

A : Angular momentum of a satellite about a planet is constant . R :Gravitational force is a central force so its torque about the sun is zero .

A planet travels in an elliptical orbit about a star as shown. At what pair of points is the speed of the planet the same?

A planet of mass 4 times earth spins about itself and completes one rotation is 96 hours . The radius of a secondary stationary satellite about this planet in comparisons to the radius of the geostationary orbit around the earth is