Upon what does the power of a lever depend?
It depends upon how much nearer the fulcrum is placed to one end of the lever, than to the other end.
Of what use is the lever?
It is very useful in raising heavy bodies.
Fig. 42.
What is the weight to be lifted in [Fig. 42]?
The stone is the weight to be lifted.
Where is the fulcrum placed?
The fulcrum is placed near the stone.