A satellite flies at a height above the ground equal to twice the Earth's radius…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A satellite flies at a height above the ground equal to twice the Earth's radius. Find there, and the weight there of a astronaut. ( on the ground.)
Need a reminder? The key ideaShow
Near a planet, ; at a distance from its centre, falls as . On the Earth's surface ; at Earth radii above the ground it is .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Distance. from the centre.
Step 2. g. .
Step 3. Weight. .
Answer: ; .
Watch out. Use the distance from the centre (), not the height ().
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