A balanced lever has two weights on it, the first with mass #7 kg # and the second with mass #30 kg#. If the first weight is # 7 m# from the fulcrum, how far is the second weight from the fulcrum?

1 Answer
Mar 16, 2018

Answer:

The distance is #=1.63m#

Explanation:

commons.wikimedia.org

The first mass is #M_1=7kg#

The distance #a=7m#

The second mass is #M_2=30kg#

Taking moments about the fulcrum

#M_2xxb=M_1xxa#

The distance

#b=(M_1xxa)/(M_2)=(7*7)/30=1.63m#