Work, Energy and Work - Energy relation

Story Book 

Cover page 

page1

Page2

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page5

Page6

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page 10

Learning Objectives

• Define work and energy.
• State the SI unit of work and energy as joule (J).
• Explain the work-energy relation.
• Describe Joule's experiment.
• Apply concepts to real-life situations.

Competencies

• Conceptual Understanding
• Application of Formulae
• Scientific Reasoning
• Problem Solving
• Critical Thinking

Learning Outcomes

• Explains work and energy correctly.
• Uses the unit joule (J) appropriately.
• Relates work done with energy transfer.
• Interprets Joule's experiment.
• Analyzes energy transformations.

MCQ Assessment

1. Work is done when:

Force acts without displacement Force causes displacement Object remains at rest None of these

2. SI unit of work is:

newton joule watt pascal

3. Energy is the ability to:

produce heat only do work move only produce sound only

4. Joule's experiment proved the relation between:

force and pressure heat and temperature work and heat mass and volume

5. If there is no displacement, work done is:

maximum zero negative infinite

HOTS Questions

1. A student pushes a wall but it does not move. Is work done?

No. Work done is zero because displacement is zero.

2. Why does water become warm in Joule's experiment?

Mechanical work done by the falling weights is converted into heat energy.

3. How does Joule's experiment support conservation of energy?

It shows that mechanical energy changes into heat energy without being lost.