Wedge.
What is a wedge?
A wedge is a double inclined plane, as is represented in [Fig. 59].
Fig. 59.
Of what use is the wedge?
The wedge is used in splitting logs of wood and blocks of stone.
For what other purposes is the wedge used?
The wedge is used to fasten handles in hammers, hatchets, axes, and hoes.
How is power applied to the wedge?
Power is applied to the wedge by means of sudden blows from a hammer.
What prevents the wedge from flying back after the blow?
The friction between the wedge and the other body, keeps it from flying back.
What instruments are made in the form of a wedge?
Knife-blades, hatchets, axes, razors, and cutting instruments of nearly all kinds, are in the form of the wedge.