A balanced lever has two weights on it, the first with mass #12 kg # and the second with mass #36 kg#. If the first weight is # 4 m# from the fulcrum, how far is the second weight from the fulcrum?

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Answer 1 · 2017-04-16T12:37:47

The distance is #=1.33m#

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Mass, #M_2=12kg#

Mass, #M_1=36kg#

Distance, #b=4m#

Taking moments about the fulcrum

#M_1*a=M_2*b#

#a=M_2/M_1*b#

#=(12g)/(36g)*4=4/3m#