Lesson
Angular Kinetics - continued
TORQUE and its EFFECT on LEVERS and EQUILIBRIUM
LEVERS
When a muscle develops TENSION, pulling on bones to support or move body
segments and any added loads, the muscles and bone function as MECHANICAL
LEVERS.
A LEVER is a simple machine made up of a rigid bar-like body, that rotates about an
axis or fulcrum (point of support).
When FORCE is applied, a LEVER is able to move a RESISTANCE.
THREE classes of levers:
FIRST CLASS: The APPLIED FORCE and the RESISTANCE are on opposite sides of
the AXIS of ROTATION
SECOND CLASS: The RESISTANCE is between the APPLIED FORCE and the FULCRUM
THIRD CLASS: The APPLIED FORCE is between the FULCRUM and the RESISTANCE