1. The problem statement, all variables and given/known data(adsbygoogle = window.adsbygoogle || []).push({});

This is an question from (NZ) NCEA Scholarship Physics practise paper.

Calculate the height of geostationary satellite and hence calculate the lattidue of a satellite dish that must be placed vertical to point at it.

2. Relevant equations

Earth's rotational velocity = 465.1 m/s

therefore v of satellite = 465.1 m/s

using Fc = Fg

(mvsqr)/r = (GMm)/r

vsqr = GM/r

r = GM/vsqr

3. The attempt at a solution

Working so far from me:

geostationary satellite = satellite that orbits at of Earth's rotational velocity.

Earth's rotational velocity = 465.1 m/s

therefore v of satellite = 465.1 m/s

using Fc = Fg

(mvsqr)/r = (GMm)/r

vsqr = GM/r

r = GM/vsqr

= 1.8439x10pwrof9

therefore height of geostationary satellite from surface = r - radius of earth

= 1.8439x10pwrof9 - 6.39x10pwrof6

= 1.8375x10pwrof9 m

= 1.84 x 10pwrof9 m (3s.f.)

(I'm not very sure about the answer, it's quite rediculous)

And i'm having a problem with the second part of the question.

Please help :3

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# Circular Motion of Satellite

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