Posted by Kelsey on Saturday, April 10, 2010 at 6:39pm.
A satellite moves in a circular orbit around Earth at a speed of 4390 m/s
(a) Determine the satellite's altitude above the surface of Earth.(meters)
(b) Determine the period of the satellite's orbit.
(hours)
I used the equation M(sattelite)V^2/r = M(sattelite)(Mass(earth)G/r^2
and tried to solve for r by canceling out one r and the M(sattelite) which gave me
r = GM(earth)/v^2
the answer i keep getting is 20,592,718.12m
but it is not right....

physics  drwls, Saturday, April 10, 2010 at 7:55pm
Have you tried subtracting the radius of the Earth? They asked for the altitude. "r" is the distance from the center of the Earth.

physics  Kelsey, Saturday, April 10, 2010 at 7:58pm
oh wow, thanks....
wish I would have thought of that.
it worked.
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