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

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Answer 1 · 2017-04-19T06:32:02

The distance is #=3.43m#

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Mass, #M_2=3kg#

Mass, #M_1=7kg#

Distance, #b=8m#

Taking moments about the fulcrum

#M_1*a=M_2*b#

#a=M_2/M_1*b#

#=(3g)/(7g)*8=24/7m#