A balanced lever has two weights on it, the first with mass #6 kg # and the second with mass #4 kg#. If the first weight is # 5 m# from the fulcrum, how far is the second weight from the fulcrum?

1 Answer
Feb 25, 2016

Answer:

Second weight is #7.5# #m# far from fulcrum.

Explanation:

Let the the second weight be #x# #m# far from the fulcrum.

As the lever is balanced, moment (#M=F*d#, where #F# is force applied and #d# is its distance from fulcrum) of the two weights should be equal.

Moment of first weight is #6*5=30# and as it balances second weight of #4# kg, the latter's distance should be

#30/4=7.5# #m#.