1. The astronaut orbiting the Earth in Figure P4.30 is preparing to dock with a Westar VI satellite. The satellite is in a circular orbit 600 km above the Earth's surface, where the free-fall acceleration is 8.21 m/s2. The radius of the Earth is 6400 km.(adsbygoogle = window.adsbygoogle || []).push({});

a) Determine the speed of the satellite. m/s

b) Determine the time required to complete one orbit around the Earth. min

2. Relevant equations[/b]

centripetal acceleration= v squared/ radius

distance*speed= time

3. The attempt at a solution[/b]

To solve for the speed I used 8.21 as the centripetal acceleration and made that equal to v squared/7000 and then solved for v.

8.21=v squared/7000

v= 239 m/s

I then took 14000*3.14 for the circumference of the orbit and multiplied that by 239 m/s for the total time to orbit and divided that by 60 to put the answer in minutes. I got 2919.94 minutes.

However, both answers are wrong. Can I not use the free fall acceleration for centripetal acceleration?

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# Homework Help: Centripetal Acceleration and Satellite Question

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