Posted by Kate on Wednesday, January 6, 2010 at 8:37pm.
If I wanted to right
SIGMA F = ma
in the proper notation
what would I put above and below SIGMA
Would I put a lower case "n" above SIGMA and "i = 0" below it and then put a subscript "i" under the "F"
thank you I have been woundering about this as it makes sense to include these in stuff like stats so I do not see why we don't include them in physics can you please tell me what goes above and below SIGMA in this situation?
Thanks

Physics  MathMate, Wednesday, January 6, 2010 at 10:47pm
It depends on the context.
If you are working on a problem where there are 9 forces on one mass, then you would put
Σ Fi= ma
and put i=1 at the bottom and 9 at the top.
If this is a general equation to indicate that the forces acting on the mass must be summed together, then no indication of the limits is required.
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