Lifiting Heavy Stuff

Levers can be used to change both direction and force.

  •  A first class lever can do both
  • A second class lever, changes force but not direction
  • A third class lever changes force.

 

Gears

 

Pulleys

Levers are very common devices, often used to apply more force than we are capable of.  There are 3 types, first, second and third class.  Each has it's own uses.

With the correct type and design, great force can be generated.