1 / 10

Machines

Machines. Simple Machines. What is a Machine?. A device that helps us performs tasks. Designed to achieve at least one of the five main functions: Change energy from one form to another Hydroelectric plants convert falling water into electricity. Transfer forces

taima
Download Presentation

Machines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Machines Simple Machines

  2. What is a Machine? • A device that helps us performs tasks. Designed to achieve at least one of the five main functions: • Change energy from one form to another • Hydroelectric plants convert falling water into electricity. • Transfer forces • Car’s transmission transfers energy from engine to wheels.

  3. Change the direction of a force • Raising a flag up a pole, using a pulley. • Change the magnitude of a force • Using pulleys to hoist an engine out of a car. • Change distance or speed • Bicycle gears

  4. Lever Family of Machines Fulcrum: A support around which a lever can rotate or pivot Lever: A rigid bar that rotates freely around a fulcrum. Consider the teeter-totter below:

  5. Lever dL= load arm dE= effort arm Fulcrum Load Force (FL ): The force exerted by the load on the lever (weight). Effort Force (FE ): A force applied to one end of the lever.

  6. Types of Levers • First Class Levers: A lever with the fulcrum between the load and the effort force. • Examples?? • Second Class Lever: A lever with the load between the fulcrum and the effort force. • Examples?? • Third Class Lever: A lever with the effort exerted between the fulcrum and the load. • Examples??

  7. Name the Type of Lever 2nd Class 1st Class 3rd Class

  8. Inclined Plane Family of Machines • Inclined Plane: A ramp that increases the load that can be raised by an effort force. • Stairs, ramps… • Wedge: A double inclined plane that increases the applied or effort force. • An axe… • Screw: An inclined plane wrapped around a central shaft that increases the applied or effort force.

  9. Compound Machine: A machine made up of two or more simple machines.

  10. Wheel & Axle

More Related