Hi everyone
here are the correct formulas from yesterday's class:
Escape Velocity/speed:
1.
Kinetic energy = Potential energy
Notation form: Ek = Ep
1/2mv2 = Gm₁m₂
V=√2Gm/r
2. Determining g of a planet:
Fg=mg Fg=Gm₁m₂/r2
g=Gm/r2
3. Determining r, m, T:
Fc=m4π2r/T2 Fg=Gm₁m₂/r2
4π2r/T2=Gm₂/r2
solve for m:
m= 4π2r3/GT2
solve for T: T2= 4π2r3/Gm
* period and radius is all you need to use this formula
4. Orbital Velocity:Fc=mv2/r Fg= Gm₁m₂/r2
v2=Gm₂/r
** also remember that force formulas have r2 (squared)but energy formulas have only r radius.
April 30, 2010 12:02 AM
4 comments:
Are you SURE these are all correct??
I am no longer SURE if my formulas are correct and I can't find my mistakes( or I can't seem to focus).
Anyway, I would really appreciate it if you pointed out my mistakes Mr.K or any one else form my class...PLEASE!
Force is inversely proportional to radius squared and energy is inversely proportional to radius.
THANKS MS. k.
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