2 LINEAR TRANSMISION

LINEAR TRANSMISION 

Linear transmision mechanisms:use linear motion input to produce linear motion output. We typically use these mechanisms to transmit force.

- A lever is a rigid bar that turns around a point called a fulcrum.When the forces acting on opposite ends of a lever are equal, we say the lever is in equilibrium.

F x d= R x r

- Classes of levers: The locations of the fulcrum, force and resistance divide levers into 3 classes.

CLASS 3: Levers increase the distance that the end of the lever moves.CLASS 2: Levers increase the force that we apply.CLASS 1: Levers can do both of those things.CLASS 3:

CLASS 2:

CLASS 3:

Pulleys and compound pulley systems:
A pulley is a wheel that rotates around an axis and has a groove and a compound pullley system is a combination of fixed and movable pulleys. It is also called a block and tackle system.

Fixed pulley                                                                              Movable pulley

Force=Resistance                                                                      Force=Resistance/2



Vertical and horizontal systems                                                 Exponential system

F=R/2 x n                                                                                      F=R/2^n