# 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?

##### 1 Answer

May 8, 2018

The second mass is

#### Explanation:

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)