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# Mechanics 2 help watch

1. So Im really confused in mechanics 2 for centres of mass (
So if you have a couple of points on the y axis with some masses, and we want to find the centre of mass, how are we meant to do that? Because the weights act vertically downwards, no turning effect would be produced by the masses, and so im thinking i cant use the formula of Mx= sigma mixi, because i cant take moments cause there isnt a turning effect!
Thanks
2. I seem to recall this equation i found online about the centers of mass of points lying on the same line:

CMass = 1/(Total mass of system/(SUMMATION of Mass of object x coordinates))

Not sure if this is correct though

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Updated: February 4, 2017
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