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February 1, 2015

February 1, 2015

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

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].

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