A satellite has a mass of 106 kg and is located at 2.03 106 m above the surface

Physics
Tutor: None Selected Time limit: 1 Day

A satellite has a mass of 106 kg and is located at 2.03  106 m above the surface of Earth.

(a) What is the potential energy associated with the satellite at this location?
 J

(b) What is the magnitude of the gravitational force on the satellite?
 N
Jun 8th, 2015

Thank you for the opportunity to help you with your question!

a)  P= m g' (R + h) – m g R = m g R²/(R+h) – m g R, R is radius of earth= 6371000 

 = - m g R h/(R+h) 

 = - 106 * 9.8 * 6371000 * 2.03*10^6/(6371000 + 2.03*10^6) 

 = - 1599.207*10^6 J 

b)  g = GM/R² 

g' = gR²/(R+h)² 

F=mg'=m(gR²/(R+h)²)

F=106(9.8*6371000²/(6371000+2.03*10^6))²

F= 597.43N

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 8th, 2015

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