The International Space Station has a mass of 4.19 ✕ 105 kg and orbits at a radius of 6.79 ✕ 106 m from the center of Earth. Find the gravitational force exerted by Earth on the space station, the space station's gravitational potential energy, and the weight of a 72.8 kg astronaut living inside the station.
HINT
(a)
the gravitational force (in N) exerted by Earth on the space station (Enter the magnitude.)

N
(b)
the space station's gravitational potential energy (in J)

J
(c)
the weight (in N) of an 72.8 kg astronaut living inside the station

N