Register to reply 
Proving GPE considering 0 at earths surface 
Share this thread: 
#1
Feb1914, 04:39 AM

P: 61

Can someone derive the formula to calculate the GPE of a mass which is away from the earth by considering 0 potential at earths surface



#3
Feb1914, 05:49 AM

Sci Advisor
Thanks
PF Gold
P: 12,132

The answer will be a constant times (1/R_{1}  1/R_{2}), which can be rewritten (with R_{2}  R_{1} on the top) and then you substitute h = R_{2}  R_{1}. Then you assume h << R and then you can eliminate some terms to give mgh. (Where g is the value at the surface) You can do this! 


Register to reply 
Related Discussions  
Ocean tides and earths surface.  General Physics  2  
Distance of a satellite from the earths surface.  Introductory Physics Homework  2  
Earths surface temperature at night...  Earth  24  
Can a bullet fired reach a percentage of the earths surface?  Calculus & Beyond Homework  3  
Motion near earths surface  Introductory Physics Homework  16 