A balanced lever has two weights on it, the first with mass 3 kg 3kg and the second with mass 7 kg7kg. If the first weight is 8 m8m from the fulcrum, how far is the second weight from the fulcrum?

1 Answer
Apr 19, 2017

The distance is =3.43m=3.43m

Explanation:

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Mass, M_2=3kgM2=3kg

Mass, M_1=7kgM1=7kg

Distance, b=8mb=8m

Taking moments about the fulcrum

M_1*a=M_2*bM1a=M2b

a=M_2/M_1*ba=M2M1b

=(3g)/(7g)*8=24/7m=3g7g8=247m