# Combine forces (gravity)

I have a point at which there are (at least) two different forces (gravity to be precise) working. How do I combine those so that the force acting on the point are as realistic as possible?

To put the question into context: I have a small object which is attracted by two other large objects (that's the only direction I look at the problem, the large objects are not attracted by the small object). The force from that attraction is calculated by Newton's law of universal gravitation. So basically I have two vectors which represent those two gravitational forces. Currently I just sum those vectors up, but that seems kind of wrong.

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Assuming that when you say I just sum those vectors up you mean vector addition (hyperphysics.phy-astr.gsu.edu/hbase/vect.html) you are calculating the total force correctly. –  John Rennie Aug 30 '13 at 15:09