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Potential Energy |
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| Jan5-13, 11:03 AM | #1 |
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Potential Energy
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 |
| Jan5-13, 11:35 AM | #2 |
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Mentor
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Upper-case G is the universal gravitational constant. It is basically just a conversion factor. It is negative by convention.
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| Jan5-13, 12:41 PM | #3 |
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Hello,
What is the conversion factor? Does that mean the equation for G and -G are the same? -- Shounak |
| Jan5-13, 03:46 PM | #4 |
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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? |
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