GMm1/r1^2=m1 v1^2/r1
GM=v1^2 r1
but
GMm2/r2^2=m2 v2^2/r2
GM=v2^2 r2
set them equal
V2^2=v1^2*r1/r2
v2= v1 sqrt (r1/r2) check my math...
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.50 106 m. What is the orbital speed of the second satellite?
Please help! I used the equation v=sqr root over G(m/r) and I can't get the right answer. Thanks:)
1 answer
2 answers