# Circular and simple harmonic motion

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#1
I cannot do this question for the life of me, A satellite orbits the earth 200km above its surface. At this point gravity is 9.2ms-2. If the radius of the earth is 6400km. What is the speed of the satellite?
You have to use either circular or s.h.m
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5 years ago
#2
(Original post by IVIissJess)
I cannot do this question for the life of me, A satellite orbits the earth 200km above its surface. At this point gravity is 9.2ms-2. If the radius of the earth is 6400km. What is the speed of the satellite?
You have to use either circular or s.h.m
Do you know the equation relating the gravitational force on the satellite and the centripetal force? Also, SHM is for oscillating bodies so you cannot use it here for orbiting bodies
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