# Physics

posted by .

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.70 106 m. What is the orbital speed of the second satellite?

• Physics -

A = v^2/r
A = (1.70*10^4)^2/(5.30*10^6)
A = 54.53
A = G(m/r^2)
m = A*r^2/G
G = 6.67*10^-11
m = 54.53*(5.30*10^6)^2/6.67*10^-11
m = 2.30*10^25
------------------------------------
A = G(m/r^2)
A = 6.67*10^-11(2.30*10^25/(8.70*10^6)^2)
A = 20.27
A = v^2/r
(A*r)^(1/2) = v
v = 13279.6 m/s^2

• Physics -

V = sqrt[µ/r]
µ = V^2(r) = (1.7x10^4)^2(5.3x10^6) = 1.5317x10^15

V2 = sqrt[1.5317^15/8.7x10^6] = 1.3268x10^4m/s

## Similar Questions

1. ### physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 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 …

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.65 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this …
3. ### physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.80 104 m/s, and the radius of the orbit is 5.45 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this …
4. ### Physics 141

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 …
5. ### Physics 141

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 …
6. ### physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.75 104 m/s, and the radius of the orbit is 5.15 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this …
7. ### physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.80 104 m/s, and the radius of the orbit is 5.20 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this …
8. ### LSU

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.53 x 104 m/s, and the radius of the orbit is 3.42 x 106 m. A second satellite also has a circular orbit around this same planet. The orbit …
9. ### Physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 × 104 m/s, and the radius of the orbit is 5.80 × 106 m. A second satellite also has a circular orbit around this same planet. The orbit …
10. ### Physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 2.15 × 104 m/s (Va) and the radius of the orbit is 5.15 × 106 m (ra). A second satellite also has a circular orbit around this same planet. …

More Similar Questions