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

What is the work done to place a satellite of mass 600kg which orbits the Earth at a radius of 8.00 x 10^6 m.

3. The attempt at a solution

1st attempt :

W= F x d

= GmM/(r^2) x r

= GmM/r where r is the radius of the satellite

The answer I got is 3 x 10^10 J which is incorrect.

2nd attempt :

W= F x ∆d

= GmM/(r^2) x ( r - r.E ) where r.E is the radius of the Earth

The answer I got is 6.2 x 10^9 J which is also incorrect.

3rd attempt :

W= ∆E total

= -GmM/2r - ( -GmM/2r.E )

= -GmM/2 x ( 1/r.E - 1/r )

The answer I got is 3.8 x 10^9 J which is also incorrect.

The answer for the question is 2.3 x 10^10 J.

From my three attempt, I think I haven't understand the concept of work and energy of a satellite. Can someone help me to identify my mistakes and rectify it?

I appreciate your kind assistance^^

Thank you for spending your time to read this post and help me to solve the problem ^^

Thank you once again ;)

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# Homework Help: Work done on a satellite ( Physics Problem )

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