A balanced lever has two weights on it, the first with mass #5 kg # and the second with mass #80 kg#. If the first weight is # 16 m# from the fulcrum, how far is the second weight from the fulcrum?
The second mass is
Balancing a lever means balancing the moment or torque in the system.
Knowing that moment is equal to the force applied multiplied by the length of the lever arm (
Now, lets plug in our numbers:
I multiplied the masses by the gravitational constant
Notice that the gravitational constant cancels (why I said this was extra for this question)