korosh23
  • korosh23
Physics 12 Static Equilibrium Question! How to understand the position of the folcrum in static equilibrium?
Physics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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korosh23
  • korosh23
|dw:1447298727721:dw| Please explain thank you.
anonymous
  • anonymous
For a regularly-shaped object, the fulcrum is exactly at the mid-point or centre point of the object. Given that your object is a straight line, then the fulcrum is at half its total length.
korosh23
  • korosh23
@Hoslos that is not always the case, you can use the folcrum to get rid of unknow forces, but where to use it I still do not understand. For this situation my teacher said FN1, why?

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More answers

anonymous
  • anonymous
FN1 is the fulcrum? Is all the information given that picture only?
anonymous
  • anonymous
I think it honestly depends on the forces. If your fulcrum is in static equilibrium, then that means the moment on both sides of the fulcrum must be equal. That is, \[\huge \sum M_L=\sum M_R\]
korosh23
  • korosh23
sorry guys, the picture is this, I can draw it , wait a sec please
ganeshie8
  • ganeshie8
take a screenshot and attach if psble
korosh23
  • korosh23
|dw:1447300664864:dw|
korosh23
  • korosh23
|dw:1447300786345:dw|
korosh23
  • korosh23
@ganeshie8
anonymous
  • anonymous
I honestly don't know. There could be more to the problem than what you know/sharing with us. I would ask your teacher and see what he says. Please let us know too! I'm curious to know why as well.
IrishBoy123
  • IrishBoy123
depending on how you wish to see it, you have zero or you have 3 fulcrums [fulcra!!] here |dw:1447318281865:dw||dw:1447318297819:dw| i wouldn't get too hung up on words, what matters is that you can solve problems like this. :p |dw:1447318415303:dw|
IrishBoy123
  • IrishBoy123
OMG you have zero or you have [3: no, no, no !!!! i meant......] ****2***** fulcrums / fulcra
korosh23
  • korosh23
@Irishboy I agree with you, by using the folcrum we can eleminate the unknow forces, or substitue one for the another to get the answer.

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