A balanced lever has two weights on it, the first with mass 2 kg 2kg and the second with mass 9 kg9kg. If the first weight is 4 m4m from the fulcrum, how far is the second weight from the fulcrum?

1 Answer
May 2, 2018

The distance is =0.89m=0.89m

Explanation:

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The mass M_1=2kgM1=2kg

The mass M_2=9kgM2=9kg

The distance a=4ma=4m

Taking moments about the fulcrum

M_1xxa=M_2xxbM1×a=M2×b

b=(M_1xxa)/(M_2)=(4xx2)/(9)=0.89mb=M1×aM2=4×29=0.89m