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Calling all mechanical engineers - lever problem ... :-))

I am hoping someone can tell me what the equation is to calculate the weight acting on each of 3 springs when the springs are different distances away from a (central) weight.

For instance, if I had 3 springs placed at the apexes of an equilateral triangle, then a 9lb weight placed in the middle of the springs (say 10" away from each spring) would result in an effective weight of 3 lbs on each spring.
NB: lets assume the 9lb weight is resting on a stiff, 3-pointed star which has no weight in itself. The ends of the star arms rest on the springs.

Now, what happens when we have different distances from each spring to the weight - say:
* 7.5"
* 8.25" and
* 10"?

Any takers? :-))


Thanks,

Andy


Edits: 10/04/14
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Topic - Calling all mechanical engineers - lever problem ... :-)) - andyr 21:59:02 10/04/14 (46)
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