Question

If the 78.0 kg astronaut were in a spacecraft 6R from the center of the earth, what would the astronaut's weight be on earth?

Answer 1

Kind of a trick question:) you don't need to know how far from the earth he is just use
F=ma
F=78kg*9.8m/s^2=764.4N
Or 171.8 lbs

Answer 2

If the astronaut's mass is 78 kg, then he weighs about 764 Newtons on Earth, and about 21 newtons when he's 5 Earth radiuses off the surface.