Mechanisms change an input force into an output force, changing direction or magnitude.

There are different types of movement.

Linear movement is in a straight line in one direction.

Reciprocating movement is in a straight line in two directions.

Rotary movement is movement on or around an axis.

Oscillating movement is movement back and forth along a curved path.

Some simple mechanisms are

• Inclined plane

• Screw

• Wheel and axle

• Wedge

• Lever

• Pulley

Mechanical advantage is a measure of the force amplification achieved by using a mechanism.

It is calculated by dividing load by effort.