Simple Machines. What is a Machine?. A machine is a device that helps us perform tasks. How are machines used?. change energy from one form into another transfer forces change the direction of a force change the magnitude of a force change distance or speed. Real simple machines.
All machines can be grouped into two categories:
A lever is a rigid bar that can rotate freely around a support called a fulcrum.
FulcrumThe Lever Family
Distance to the Effort
Distance to the Load
Force of the Load
(mass) x 9.8
Force of the Effort
Examples include a shovel or pry bar
Examples include a wheel barrow
Examples include a fishing rod