Simple Machines
Six Groups of Simple Machines
Lever Wheel and Axle Pulley Inclined Plane Wedge Screw
1. Pliers, Scissors 2. Triple beam balance 3. Hedge/Pruning shears 4. Pry-Bar, Crow Bar 5. Eyelash Curler
Examples of 1st Class Levers
1. Wheelbarrow 2. Nutcracker 3. Handle on fingernail clippers 4. Gas Pump Handle 5. Pop Bottle Opener
Examples of 2nd Class Levers
Wheel and Axle The axle is a rod that goes through the wheel which allows the wheel to turn.
Wheel and Axle
Wheel and Axle
Examples of Wheel & Axles:
1. Screwdriver 2. Door Knob 3. Windmill 4. Ceiling Fan 5. Bike Wheel
A modification of an inclined plane that moves.
It is made of two inclined planes put together.
Wedges
A screw is an inclined plane wrapped around a central cylinder.
The inclined plane allows the screw to move itself when rotated.
Screw
Compound Machine
Simple Machines can be put together in different ways to make complex machinery.
Compound machine: Made up of two or more simple machines.
Examples: Cars, Tractors, Cranes, Bicycles, Tanks, egg beaters, etc…