A 2.20 kg mass is at the origin. A 4.66 kg mass is 3.00 m to its right,
and another 4.66 kg mass is 3.00 m
to its left.
What is the net gravitational force
on the 2.20 kg mass?

0

Explanation:

F1 = G•2.2•4.66/3² (pointed right)

F2 = G•2.2•4.66/3² (pointed left)

subtract the two to get zero

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west