
#1
Dec803, 12:14 AM

P: 10

Dear all
I know that E(grav) = GmM / r, Can I use Work done = F x s to calculate the P.E between two mass of the space? Thank a lot.Good Bye Billy 



#2
Dec803, 03:26 AM

P: 321

dw =  F dx [tex]\int ^{w'}_{0} dw =  \int ^{\infty}_{r} \frac{GMm}{x^2} dx[/tex] [tex]w' = \frac{GMm}{r} [/tex] Where w' is the work required to take an object from infinity to a particular point in a Gfield, with distant r away from the other object. 


Register to reply 
Related Discussions  
work in mechanics vs. work in thermodynamics  Introductory Physics Homework  3  
Work input/output, efficient probelm, just need someone to check my work :)  Introductory Physics Homework  1  
Work, Energy and Power (Work Problem)  Introductory Physics Homework  9  
The work of friction forces  and  the total work of systems  Introductory Physics Homework  20  
work question: please check my work  Introductory Physics Homework  1 