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Lesson

Force, Work, and Energy

Explore pushes and pulls, useful friction, work, and changes between stored energy and movement.

30min lesson

Objectives3 goals Lesson6 blocks Review11 assets Practice39 items

Learning objectives

What to understand

3 goals

Start lesson

Identify forces in everyday actions.
Explain when a force does work on an object.
Describe helpful friction and simple energy changes.

Lesson

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6 sections

Concept

Key idea

A force is a push or pull. It can start or stop motion, change speed or direction, or change an object's shape. Your muscles provide force when you lift a bag. Gravity pulls the bag down towards Earth. In science, doing work on an object needs both force and movement. Lifting a book does work against gravity because the book moves upwards while you apply an upward force. Pushing a wall that stays still does no work on the wall, even though your muscles use energy. Energy allows changes to happen. A moving ball has kinetic energy. A raised book has gravitational potential energy, and a gently stretched elastic band stores elastic potential energy. Energy can change form: a battery-powered fan changes stored chemical energy into electrical energy, then movement, with some sound and warming.

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6 lesson sections6 cards / 5 notes20 MCQs / 19 written questions

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39 prompts

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Force, Energy, and Simple Machines

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Force, Work, and Energy

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Step-by-step lesson

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Force, Energy, and Simple Machines

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Force, Work, and Energy

What to understand

Step-by-step lesson

Key idea

What to notice

Worked example

Common mistake to avoid

How to structure the answer

Quick check

Key idea

Choose your next activity

Note highlights

Key idea

Summary

Remember

Answer tip

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Force, Energy, and Simple Machines

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Around this topic