Posted by **dreamygirl** on Tuesday, May 15, 2012 at 7:29pm.

The Canadian microsatellite MOST (Microvariability and Oscillations of Stars) has a mass of just 52 kg. It travels in an almost circular orbit at an average altitude of 820 km above Earth’s surface.

a) Calculate the gravitational force between Earth and the MOST satellite at this altitude.

b) What speed does the MOST satellite need to maintain its altitude? Express the speed in metres per second and kilometres per hour.

c) Determine the orbital Period of MOST.

- Phizzics.... -
**Elena**, Wednesday, May 16, 2012 at 6:17am
(a) F=G•m•M/(R+h)²,

where the gravitational constant G =6.67•10^-11,

Earth’s mass is M = 5.97•10^24 kg,

Earth’s radius is R = 6.378•10^6 m.

h =8.2•10^5 m,

m = 52 kg.

(b) m•a = m•v²/(R+h) = G•m•M/(R+h)².

v =sqrt [G•M/(R+h)]

T =2•π• (R+h)/v =

=2•π•(R+h)/sqrt[G•M/(R+h].

## Answer This Question

## Related Questions

- Astronomy - The Hubble Space Telescope orbits at an altitude of 600 km above the...
- PHYSIC - 1)What must be the orbital speed of a satellite in a circular orbit 740...
- physics... - A satellite moves in a circular orbit around the Earth at a speed ...
- physics - A satellite of mass 225 kg is launched from a site on Earth's equator...
- physics - A satellite moves in a circular orbit around Earth at a speed of 4390 ...
- Physics - A satellite moves in a circular orbit around the Earth at a speed of ...
- physics - A satellite moves in a circular orbit around the Earth at a speed of 6...
- Physics - Calculate the percentage of Earth’s gravitational force on the ISS ...
- physics - A satellite moves in a circular orbit around the Earth at a speed of ...
- Physics - A satellite moves in a circular orbit around the Earth at a speed of 5...

More Related Questions