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Pulleys

Pulleys. By: Alexis, Thomas, & Ethan. What is a pulley?. A pulley is a wheel on an axle that is designed to support movement on a cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power.

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Pulleys

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  1. Pulleys By: Alexis, Thomas, & Ethan

  2. What is a pulley? • A pulley is a wheel on an axle that is designed to support movement on a cable or belt along its circumference. • Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. • A pulley is also called a sheave, or drum, and may have a groove between flanges around its circumference.

  3. Examples of pulleys: • Cranes • Windows • Engines • Clothes lines • Chair lifts • Flag poles

  4. What are they used for? • Pulleys can do more than redirect the pulling tension of a rope. • Gain mechanical advantage • Reducing the force needed to move or lift a load

  5. Questions: • How do you use pulleys in your daily life? • What are some examples? • What are they used for? • Who is the current president? • Are zebras white with black stripes or black with white stripes? • What came first the chicken or the egg?

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