(a) A 4.9 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.6 ? 10-12 N. What is the gravitational potential energy of the two-particle system?
____J
(b) If you triple the separation between the particles, how much work is done by the gravitational force between the particles?
____J
(c) How much work is done by you?
____J