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Exploring Simple Machines: Wheel, Axle, Wedge, Screw

Discover the wheel and axle, screw, wedge - essential simple machines that make work easier. Learn how each functions and their real-life applications.

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Exploring Simple Machines: Wheel, Axle, Wedge, Screw

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  1. Simple Machines – Wheel and Axle, Wedge and Screw

  2. Wheel and Axle • A wheel and axle is a combination of 2 wheels of different diameter that turn together. • The largest wheel is the wheel • The smallest wheel is the axle

  3. Load arm Effort Arm • Examples of this type of wheel and axle: • 1. Motor • 2. Ski lift • 3. Bike • Because the LOAD ARM is longer than the EFFORT ARM we get a speed/distance advantage! Effort Force Load

  4. Effort arm Load Arm • Examples of this type of wheel and axle are: • 1. Steering Wheel • 2. Door Knob • Because the EFFORT ARM is longer than the LOAD ARM, we get a mechanical advantage. Effort Force Load

  5. Screw • A screw is an inclined plane wrapped around a cylinder • A screw gives you a mechanical advantage. • The closer the threads, the more of a force advantage you get. • A screw can be used to convert turning motion into linear (straight) motion. • EXAMPLE: Archimedes screw

  6. Wedge • A wedge is a two sided inclined plane that goes into an object. • By pressing on the wide end of the wedge, you can exert a force on the narrow end so it splits an object apart. • Examples: • 1. Knife blade • 2. Axe • 3. Door stop 2 Inclined Planes Load Load Effort Force

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