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Physics

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a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force.
a) chain with a weight of 2.5 N has a 1.0 N hanging weight
b) chain with a weight of .5 N has a 1.0 N hanging weight
c) stretched elastic band with negligible weight has a 1.0 N hanging weight

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    I don't know the picture.

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