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Physics question. Please help.?
A satellite orbits a planet of unknown mass in a circle of radius 2.0 x 10^7 meters. The magnitude of the gravitational force on the satellite from this planet is F=80N.
A) What is the kinetic energy of the satellite in this orbit?
B) What would F be if the orbit radius were increased to 3.0 x 10^7 meters?
1 Answer
- AlexanderLv 61 decade agoFavorite Answer
Kinetic energy is equal to negative half of virial of forces.
http://en.wikipedia.org/wiki/Virial_theorem
Virial of the force of gravity is
Vr = F * R = -160 e+7 Nm
Answer: (a) 800 MJoules
