English National Curriculum - Science

Levers and gears

Mission Objectives

Explain how a lever can act as a force multiplier

Calculate the turning force acting on an object

Explain how gears can be used to increase or decrease a turning force

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Keywords

Words and meanings to learn

lever

a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum

moment

the measure of the turning effect of a force acting at a distance from a pivot point

turning effect

the rotational equivalent of force; it refers to the ability of a force to cause an object to rotate around a pivot point or axis

gear

a rotating wheel with teeth that interlock with another gear or part to transmit torque and change the direction or speed of rotational movement

force multiplier

a machine or mechanism that increases the input force, allowing a smaller force to have a greater effect; levers, gears and pulleys are examples of force multipliers

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This lesson has been written by

Samantha Batch

Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.

Underpinning this is a strong foundation in applied science built across a range of industry roles. Samantha has held scientific roles at John Smith's Brewery, Yorkshire Water and WasteCare, where she led technical projects, drove operational efficiencies and ensured compliance with industry standards. Across these roles she has first-hand experience of how scientific knowledge translates into measurable outcomes in professional and commercial environments.

In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket. 

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