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Scholar
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posted by  abmuk on 7/22/2009 3:19:27 PM  |  status: Live  |  Earned Karma: 288

Work Formula

Course Textbook Chapter Problem Needs by
Calculus Based Physics University Physics with Modern Physics (12th) by Young, Freedman 6 66P N/A
Question Details:
Greetings,
 
I am trying to understand how we know that W=Gm1m2/r in this particular problem?
 
A step-by-step explanation is greatly appreciated!
 
Thank you.
 
 
 "If you have knowledge, let others light their candles in it."
                                                                            Margaret Fuller
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Sage
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posted by MasterChef on 7/22/2009 4:12:34 PM  |  status: Live
Asker's Rating: Helpful   
Response Details:
The definition of Work is:


We are integrating the force of gravity here we we have:


After integrating we have:


Re=6378100m
M2=mass earth=5.9736x10^24kg
M1=20000kg
G=6.673x10^-11

We also know

         




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