English National Curriculum Science - Previous Lessons - Science

7. Learn about the impact pulleys, gears and levers have on forces

Mission Objectives

Describe what gears, levers and pulleys are

Explain why gears, levers and pulleys are helpful, and give some examples

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Keywords

Words and meanings to learn

gear

A circular rotating cog with teeth which mesh with another object.

lever

An adjustable bar and fulcrum which operates by adding forces at either end of the bar and relies on torque to function

pulley

A wheel that holds onto a cord, flexible rope or other types of cable to lift up heavy objects

teeth

Sections in a wheel which are either inserted or cut in to allow it to mesh with another circular teethed object

fulcrum

The support for a bar to help balance it.

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