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Simple Machines

Simple Machines. Sikes & West S4P3a: Identify simple machines and their uses. What are simple machines?. Simple machines make work easier for us by allowing us to push or pull over increased distances. There are 6 types of simple machines. Lever.

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Simple Machines

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  1. Simple Machines Sikes & West S4P3a: Identify simple machines and their uses.

  2. What are simple machines? • Simple machines make work easier for us by allowing us to push or pull over increased distances. • There are 6 types of simple machines.

  3. Lever • A lever is made up of 2 parts: a bar and a fixed point. • The fixed point is called a fulcrum. • There are 3 types of levers.

  4. Three Types of Levers

  5. Pulley • Makes it easier to lift a heavier load. • There are fixed pulleys and moveable pulleys. • The picture to the right is a fixed pulley. A fixed pulley only changes the direction of force, you pull down on the string and the load goes up.

  6. Wedge • A wedge changes a downward or forward force into a sideways force. • A wedge is an object with at least one slanting side ending in a sharp edge, which cuts material apart.

  7. Inclined Plane • An inclined plane is a simple machine with one flat slanted surface. This holds up and supports most of the weight load. • Another way to describe an inclined plane is to say that it is a slanting surface connecting a lower level to a higher level. • The most common inclined plane is a ramp. • It does not use much force, but you do have to move the load farther.

  8. Screw • A screw is an inclined plane twisted into a spiral. • A screw holds things together or lifts materials.

  9. Wheel and Axle • A wheel and axle has two parts- a wheel with a axle going through the middle of the wheel. • You only need to use a small force on the wheel. • The axle turns the force into a larger force, which moves the load. • A doorknob is an example of a wheel and axle.

  10. Compound Machines • Using two or more simple machines. • Most machines are compound machines. • Can you name some examples of other compound machines not shown here?

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