Calculate the earth's gravity force on a 60 kg astronaut who is repairing the hubble space telescope 600 km above the earth's surface express your answer using two significant figures. 2.) compare this gravity force with his weight at the earth's surface. express your answer using two significant figures.

3.) in view of your result, explain why we say astronauts are weightless when they orbit the earth in a satellite such as a space shuttle. is it because the gravitational pull of the earth is negligibly small?