Simple and compound__machines
-
Upload
september-pollack -
Category
Education
-
view
385 -
download
0
description
Transcript of Simple and compound__machines
![Page 1: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/1.jpg)
Simple and CompoundMachines
![Page 2: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/2.jpg)
What are Simple Machines?• A device that allows work to be performed
with less effort• A device with few or no moving parts• A device that makes work easier by
changing force, distance, or by changing the direction of the force
What are Compound Machines?Two or more simple machines working together to make the work easier
![Page 3: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/3.jpg)
The 6 Simple Machines
![Page 4: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/4.jpg)
Lever
A rigid bar used to exert a pressure or sustain a weight by pivoting on its fulcrum
![Page 5: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/5.jpg)
Effort
Load
Fulcrum
If the fulcrum is located at the midpoint of the lever arm and the effort is equal to the load, then the lever will be perfectly balanced.
Lever Arm
Parts of a Lever
![Page 6: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/6.jpg)
Types of Levers
You can identify the different types of levers by the middle component.
Can you identify each type of lever on the next slide?
![Page 8: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/8.jpg)
A wheel is a lever arm that is fixed to a shaft, which is called an axle.
The wheel and axle move together as a simple lever to lift or to move an item by rolling.
Wheel & Axle
![Page 9: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/9.jpg)
Examples of Wheel & Axles
![Page 10: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/10.jpg)
A grooved wheel around which a rope, belt, or chain passes
Used to change the direction or magnitude of a force
Pulleys
![Page 11: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/11.jpg)
Examples of Pulleys
![Page 12: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/12.jpg)
Pulley Systems
![Page 13: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/13.jpg)
Flat surface set at an angle or incline
Most common inclined plane is a ramp
Able to lift objects by pushing or pulling the load
Inclined Plane
![Page 14: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/14.jpg)
Examples of Inclined Planes
![Page 15: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/15.jpg)
Functions as a moving inclined plane
Tapers to a thin edge and is used for splitting or for tightening by being driven into something
Wedge
![Page 16: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/16.jpg)
Almost all cutting tools make use of the wedge.
Examples of Wedges
![Page 17: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/17.jpg)
An inclined plane wrapped around a cylinder, forming the path and pitch
Pitch is the distance between two threads
Screw
A screw is used as a threaded fastener. It changes rotary motion to linear force.
![Page 18: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/18.jpg)
Examples of Screws
![Page 19: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/19.jpg)
What Kind of Simple Machine Is This?
Pulley Wedge Wheel and Axle
Lever Screw Inclined Plane
![Page 20: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/20.jpg)
Compound Machines
• Compound machines consist of two or more simple machines put together.
• Most devices are compound machines.
• They can do more difficult jobs because their mechanical advantage is greater.
What two simple machines are in scissors?
First Class Lever and Wedge
![Page 21: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/21.jpg)
Name the Simple Machines Present in Each Compound Machine
![Page 22: Simple and compound__machines](https://reader035.fdocuments.in/reader035/viewer/2022062510/54b675684a7959566f8b45de/html5/thumbnails/22.jpg)
Image Resources
Microsoft, Inc. (2009). Clip Art. Retrieved January 22, 2009, from http://office.microsoft.com/en-us/clipart/default.aspx