A 6200-kg satellite is in a circular earth orbit that has a radius of 3.3 × 107 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 7.0 × 106 m. What work W must the net external force do? Note that the work determined here is not the work Wlift done by the satellite’s engines to change the orbit. Instead, the work W is W = Wlift + Wgravitational, where Wgravitational is the work done by the gravitational force.