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Four objects are located as follows: 3.70 kg at (0, +12.0 m), 2.80 kg at (-16.0...

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 on the 3.70 kg object

C) total gravitational potential energy of the system.

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