A satellite moves at a constant speed in a circular orbit about the center of the Earth and near the surface of the Earth. Assume that the acceleration of gravity on this satellite is g = 9.81 m/s2 and that the radius of the Earth is 6370 km. How long does it take for this satellite to make one complete revolution around the Earth?

Respuesta :

Answer:

[tex]T=5065.66s[/tex]

Explanation:

The period of a satellite orbiting at a constant speed is given by:

[tex]T=2\pi\frac{r}{v}(1)[/tex]

Here, [tex]2\pi[/tex] is for one revolution, r is the radius of the circular motion and v is the speed of the satellite. Gravity acts on the satellite, which is responsible for the centripetal force.

[tex]g=a_c=\frac{v^2}{r}\\v=\sqrt{gr}(2)[/tex]

Replacing (2) in (1):

[tex]T=2\pi\frac{r}{\sqrt{gr}}\\T=2\pi\frac{6370*10^{3}m}{\sqrt{(6370*10^{3}m)9.8\frac{m}{s^2}}}}\\T=5065.66s[/tex]

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