(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

9. What is the total energy needed to place a 2.0 x 10^3-kg satellite into circular Earth

orbit at an altitude of 5.0 x10^2 km?

10. How much additional energy would have to be supplied to the satellite in question 9

once it was in orbit, to allow it to escape from Earthâ€™s gravitational field?

3. The attempt at a solution

9. I was trying to use the equation

Wpl = (- GMem/Ro) - (-GMem/Re)

Wpl = ( - (6.67 x10^-11 Nm^2/s^2)(5.98 x10^24)(2 x 10^3 kg)/(5 x10^5m)+(6.38 x10^6m)) - (- (6.67 x10^-11 Nm^2/s^2)(5.98 x10^24)(2 x 10^3 kg)/6.38 x10^6m))

Wpl = - 11.59494186 x 10^10 + 12.50363636 x10^10

Wpl = 0.908717 x 10^10 J

IS THIS CORRECT?

and what can i do for Question 10 ?

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# Homework Help: Gravtational Potential Energy

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