Fig. 40.
What is the cup on which the spoon rests called?
It is called a Fulcrum.
What is a fulcrum?
A fulcrum is any solid body against which a lever rests.
When the spoon is called a lever, what are the parts on each side of the fulcrum called?
They are called the arms of the lever.
What is necessary, so that a lever may balance?
The arms of the lever must be of equal weight, or they will not balance.