Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: First Term
Week: 10
Age: 15 years
Duration: 45 minutes
Subject: Physics
Curriculum Theme: Physics
Previous Lesson: Vectors.
Topic: WORK, ENERGY AND POWER
Subject Matter: Concept of work, concept of energy, concept of power, relationship between work and energy, interchangeability of work and energy in physical processes, common examples of work and power in daily activities

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define work, energy, and power.
State the SI units of work, energy, and power.
Explain the relationship between work and energy.
Identify common examples of work and power in daily activities.

Affective Domain:

Appreciate the presence of work, energy, and power in daily physical processes.
Participate actively in class discussions related to the concepts.

Psychomotor Domain:

Calculate simple problems involving work, energy, and power given relevant data.
Draw simple diagrams to illustrate situations where work is done.

Collaborate with peers to identify and discuss real-life examples.
Communicate their understanding of these concepts clearly to others.

Reference Materials

The following resources were used in planning this lesson:

Nigerian Senior Secondary Physics Curriculum
State Unified Scheme of Work
New School Physics for Senior Secondary Schools by M.W. Anyakoha
https://www.physicsclassroom.com/class/energy
https://byjus.com/physics/work-energy-power/

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts/posters illustrating work, energy, and power
Simple load objects (e.g., books, small weights)
Measuring tape
Stopwatch
Chalkboard/Whiteboard

Rationale for the Lesson

Understanding work, energy, and power helps pupils to explain how objects move and interact in the physical world. These concepts are fundamental to many technologies and daily activities, enabling pupils to better understand their environment.

Prerequisite/Previous Knowledge

Pupils are assumed to have prior knowledge of force, distance, basic arithmetic operations, and simple measurements.

Lesson Content/Board Summary

WORK, ENERGY AND POWER

1. Concept of Work

Work is done when a force acts on an object, causing it to move through a distance in the direction of the force.

The conditions for work to be done are:

A force must be applied to an object.
The object must move a certain distance.
The movement must be in the direction of the applied force.

The formula for work done (W) is: W = F × d, where F is force and d is distance.

The SI unit of work is the Joule (J).

2. Concept of Energy

Energy is defined as the ability to do work.

Energy exists in various forms, including:

Kinetic energy (energy due to motion)
Potential energy (stored energy due to position or state)
Heat energy
Light energy
Sound energy
Electrical energy
Chemical energy
Nuclear energy

The SI unit of energy is also the Joule (J).

3. Concept of Power

Power is the rate at which work is done or energy is transferred.

The formula for power (P) is: P = W / t, where W is work done and t is time.

The SI unit of power is the Watt (W).

4. Relationship between Work and Energy

The Work-Energy Theorem states that the net work done on an object equals the change in its kinetic energy.

Work and energy are interchangeable in physical processes. Work done on an object can increase its energy, and an object with energy can do work.

5. Common Examples of Work and Power in Daily Activities

Examples of work being done include:

Pushing a trolley across a floor.
Lifting a book from the table to a shelf.
Kicking a football.
A car moving up a hill.

Examples of power in use include:

A high-powered engine moving a car faster than a low-powered engine.
A person running upstairs faster than another person walking upstairs (doing the same work in less time).
Electrical appliances like blenders or fans operating at a certain power rating.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids, Practical Activity

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them what they understand by “work” in their daily lives. The teacher then relates their answers to the scientific definition of work, introducing the topic: Work, Energy, and Power.
Pupils’ Activity: Pupils respond to the teacher’s questions and listen attentively to the introduction of the topic.
Learning Point: Pupils are engaged and the lesson topic is introduced.

Step 2: Concept of Work

Time: 10 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher explains the concept of work, its conditions, formula (W=F×d), and SI unit (Joule), using examples and demonstrating with a simple load object and measuring tape. The teacher also uses a chart to illustrate.
Pupils’ Activity: Pupils listen, observe the demonstration, ask questions for clarification, and take notes. They attempt to solve simple work problems.
Learning Point: Pupils understand the definition, formula, and unit of work.

Step 3: Concept of Energy

Time: 7 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher defines energy as the ability to do work, lists and explains various forms of energy (focusing on mechanical energy), and states its SI unit (Joule). The teacher uses the chart to show different forms of energy.
Pupils’ Activity: Pupils listen, identify different forms of energy, and note down the definition and unit of energy.
Learning Point: Pupils understand the definition, forms, and unit of energy.

Step 4: Concept of Power

Time: 7 minutes
Teaching Skill: Explanation/Application
Teacher’s Activity: The teacher defines power as the rate of doing work or transferring energy, presents its formula (P=W/t), and states its SI unit (Watt). The teacher gives practical examples comparing tasks done quickly versus slowly.
Pupils’ Activity: Pupils listen, understand the concept of power, and identify examples of power in action.
Learning Point: Pupils understand the definition, formula, and unit of power.

Step 5: Relationship between Work and Energy

Time: 5 minutes
Teaching Skill: Elaboration/Connection
Teacher’s Activity: The teacher explains the Work-Energy Theorem and discusses how work done on an object can be converted into its energy, and vice-versa, citing simple scenarios.
Pupils’ Activity: Pupils listen and grasp the connection between work and energy, asking questions if needed.
Learning Point: Pupils understand the relationship and interchangeability of work and energy.

Step 6: Common Examples of Work and Power

Time: 5 minutes
Teaching Skill: Brainstorming/Reinforcement
Teacher’s Activity: The teacher guides pupils to identify and discuss more examples of work and power in their daily activities, using the chart for visual reinforcement.
Pupils’ Activity: Pupils contribute examples and discuss the concepts in real-life contexts.
Learning Point: Pupils can apply the concepts to everyday situations.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define work, energy, and power.
State the SI units of work, energy, and power.
Explain the relationship between work and energy.
Give two examples of situations where work is done and two examples of power in daily life.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 1 minute
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson and assigns homework, which could include solving problems on work, energy, and power.
Pupils’ Activity: Pupils listen to the summary and note down the homework.
Learning Point: The lesson is concluded with a recap and assignment.

Lesson Keywords

Work – The product of force and distance moved in the direction of the force.
Energy – The ability to do work.
Power – The rate at which work is done or energy is transferred.
Joule (J) – The SI unit of work and energy.
Watt (W) – The SI unit of power.
Force – An influence that can change the motion of an object.
Distance – The extent of space between two points.

Differentiation

For pupils who grasp concepts quickly, the teacher can provide more complex problems involving calculations or ask them to research different forms of energy conversion. For pupils needing additional support, the teacher will provide simplified examples, one-on-one guidance, and visual aids to reinforce understanding.

Note for teachers using this lesson plan

Encourage pupils to actively participate in demonstrations and discussions. Emphasize the practical applications of these concepts to make the lesson relatable. Ensure all pupils understand the formulas and units before moving to complex problems.