Simple machines are machines that change the force, distance, or strength of an object.
Parts of Simple Machines
- The force applied to the simple machine
- The force that a machine supplies
- The object moved by the output
- Effort Arm
- The part of the simple machine that receives the effort
- Resistance Arm
- The part of the simple machine that delivers the output
Different Simple Machines
The lever consists of a fulcrum. The fulcrum is the point at which a bar rotates on.
- First Class Levers
- In this lever, the fulcrum is in the middle of the bar
- The effort and the output are on the opposite sides of the fulcrum.
- The effort arm and resistance arm are on
- Second Class Levers
- The fulcrum is at the edge of the bar.
- The output and the effort are on the same side, and the output is larger than the effort.
- Third Class Levers
- Both arms are on the same side of the fulcrum
- Resistance arm is longer than effort arm
- Output is less than effort
- Tweezers are two third class levers put together.
A pulley is a rope running across a wheel. On one side of the rope, the pull is made to lift up the load on the other side.
Wheel and axle
A wheel is a round object that can roll. When this is put through an axle, it can be attached to anything such as a vehicle. The axle acts like the effort and resistance arm while the wheel acts like the fulcrum.
An inclined plane is a type of simple machine that slopes downward. A ramp is an inclined plane.
A wedge is an inclined plane that slopes to make a sharp edge. An example of this is an ax.
When you wrap an inclined plane around a wedge, you make a screw.
What are Compound Machines?
A compound machine is when more than one machines are combined in an object. An example of this is a tow-truck. A tow-truck has a lever, pulley, wheel and axle, and a wedge.
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