A group of scientists at NASA decide to launch a 1.72 x 103 kg satellite into a circular orbit. What is the work done by gravity when launching the satellite from Earth's surface to its orbit 521 km above? (q1015) a) -2.45 x 10 J b) -2.51 x 10 J c) 8.78 x 10 J d) -8.78 x 10 J A group of scientists at NASA decide to launch a 1.72 x 10 kg satellite into a circular orbit. What is the work done by gravity when launching the satellite from Earth's surface to its orbit 521 km above? (q1015) a) -2.45 x 10 J b) -2.51 x 10 J c) 8.78 x 10 J d) -8.78 x 10 J