# The satellite is in a circular orbit 400 km above the Earth's surface, where the free-fall?

The astronaut orbiting the Earth in Figure P4.32 is preparing to dock with a We star VI satellite. The satellite is in a circular orbit 400 km above the Earth's surface, where the free-fall acceleration is 8.27 m/s2. Take the radius of the Earth as 6400 km.

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

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

Update:

It's ok !! I actually got this one. i had to add 400 km to the total radius of the earth 6400 km, so r=6800 km...