Four objects are located as follows: 3.70 kg at (0,+12.0 m), 2.80 kg at (-16.0 m, 0), and 7.40 kg at
(+35.0 m, 0). Find the:
A) center of mass.
B) magnitude and direction of the force of gravity onthe 3.70 kg object
C) total gravitational potential energy of thesystem.
