Satalite orbiting the earth?

Question

a satalite is orbiting the earth at 7.8km/s with a radius of 6500km

a)what is the acceleration of the satalite

b)if the satalite is a mass of 1000kg, whats the force acting on it

Answer 1

The acceleration of satellite is completely centripetal.

So,

acceleration = ((velocity)^2)/radius = (7.8*1000)^2/(6500*1000)=9.36

Force = mass * acceleration = 1000*9.36 =9360N

I hope that solves it.