First order lever. Like a see-saw or balance,
the load and the force are seperated by the fulcrum. As one moves
up the
orther
moves down. The amount and the strength of the movement is proportianal
to the distance from the fulcum
Second order lever. A wheel barrow is a second
order lever. Here the load is between the force and the fulcrum.
This uses mechanical advantage to ease lifting of a large
weight.
Third order lever. Here the force is between the fulcrum and the load. Mechanical
advantage is reduced but the movement at the load point is increased.
