Simple Machines
Traci Cook
Types of Simple Machines
Lever
- A lever is a bar that rotates around a fixed point.
- A lever has three classes to them.
Ex: Look on the playground. You will notice that the seesaws look alot like the pictures in class 1 - 3.
Class 1
The fulcrum is in the middle while the load and effort are individually at each end.
Class 2
The fulcrum is now at one end while the effort is at the other end with load placed in the middle.
Class 3
The fulcrum still has the same occupation as before. But, the effort and load have swaped places. The load on the other end of the fulcrum and the effort is in the middle.
Wheel and Axel
A wheel and Axel are two cyclinders ( one large & one small) joined together. You see many wheel and Axels everyday, especially if you live in large towns such as Newy York or someplace closer like Birmingham, Alabama. That example is a car. If you look at the wheels you will notice that it has a Axel and it continues to roll.
Wedge
A wedge is a slanted obeject used to split things. A wedge is also two inclineded planes.
Ex: When you use scissors to cut, you are also using a wedge. The legs of the scissors are wedges.
Pulley
A pulley uses a wheel with a rope make work easier by moving a heavy load from one place to another.
Ex: Everymorning students from the 7th grade raise the flag. They are using pulleys to get the flage up their.
Screw
The screw is a simple machine that keeps things in place when put to work. It has a spiral wrapped around it so that it may go round.
Ex: When you want to change your light bulb you are using a simple machine. It is called Screw.
Inclinded Plane
The incline plane was used back in the mayan days. They pushed heavy items up or down a hill. You have to get from point A to point B.