Register to reply

Potential Energy

by shounakbhatta
Tags: energy, potential
Share this thread:
shounakbhatta
#1
Jan5-13, 11:03 AM
P: 278
Hello,

Can someone please explain me:

F=G m1xm2/R^2

In potential energy U=mgh

Generally it is also written that:

U=-Gxm1xM2/r+K. How -G comes into play?

Also Newton's above law of Gravitation in vector form is written as:

F_12=-Gm1m2/r12^2 r12

Here also how -G comes into play?

Coming to Gravitation acceleration:
If one of the masses is larger than the other, gravitational field is defines as:

g=-GM/r^2xr_hat

How again -G comes into play?

If somebody can explain in a step by step method.............


Thanks,

-- Shounak
Phys.Org News Partner Physics news on Phys.org
Engineers develop new sensor to detect tiny individual nanoparticles
Tiny particles have big potential in debate over nuclear proliferation
Ray tracing and beyond
russ_watters
#2
Jan5-13, 11:35 AM
Mentor
P: 22,302
Upper-case G is the universal gravitational constant. It is basically just a conversion factor. It is negative by convention.
shounakbhatta
#3
Jan5-13, 12:41 PM
P: 278
Hello,

What is the conversion factor?

Does that mean the equation for G and -G are the same?

-- Shounak

tiny-tim
#4
Jan5-13, 03:46 PM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,148
Potential Energy

Hello Shounak!

This thread is similar to your other thread, http://www.physicsforums.com/showthread.php?t=662573

Is there anything here that has not yet been answered there?


Register to reply

Related Discussions
Gravitational Potential Energy, Elastic Potential Energy, and Kinetic Energy Introductory Physics Homework 3
Total potential energy due to gravitational and electrostatic potential energy Introductory Physics Homework 4
Electric potential energy and gravitational potential energy of Deuterium nuclear? High Energy, Nuclear, Particle Physics 1
Electric potential energy and gravitational potential energy of Deuterium nuclear? Advanced Physics Homework 1
Electric potential, potential difference, and potential energy Introductory Physics Homework 2