A balanced lever has two weights on it, the first with mass #7 kg # and the second with mass #4 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 · 2017-12-08T07:21:29

The distance is #=14m#

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The first mass is #M_1=7kg#

The second mass is #M_2=4kg#

The distance #a=8m#

Taking moments about the fulcrum

#M_1 xx a=M_2 xx b#

Therefore,

#b=(M_1*a)/(M_2)=(7*8)/4=14m#