Physic Problems...HELP!!!

[The_Dude8]

a satellite is place in an orbit with a radius that is half the radius of the moon's orbit. find its period in units of the period of the moon?


please advise, thanks.

 

[Tiamat]

1. two simultaneous equations, substitute the 2nd into the first.

2. Force balance to get your equations...

Fnet = Fgrav, Keplar's 3rd law...

After deriving, you will get something like:

T²/R³ = (4 * pi²)/(G * Mearth) Assuming circular orbit.

R = Rmoon, Rsat = X * Rmoon where X = some fraction of the radius of Rmoon which is given in your problem statement.

...

 

[The_Dude8]

still not getting it...explain further please,...i suck in physic.

 

[Tiamat]

still having problems? its pretty much solved now... Just work out the derivation - very easy, get the formula i posted, then substitute.

 

[The_Dude8]

thanks u so much!!! solve it.