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. 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?