WORK, ENERGY AND POWER WEEK 9 | BASIC SCIENCE J S 2
WORK ENERGY AND POWER WEEK 9 BASIC SCIENCE J S 2
Work can also be defined as the product of an external force acting on an object and the displacement the force has caused.
By the end of the lesson students should be able to:
- Define work, energy and power.
- State units of measurement of work, energy and power.
- Identify forms of energy (heat, thermal, nuclear, solar, chemical etc.)
- Apply formula to solve calculation problems.
Lesson Plan: Work, Energy, and Power
Objectives:
By the end of this lesson, students should be able to:
- Define work, energy, and power.
- State the units of measurement for work, energy, and power.
- Identify different forms of energy (e.g., heat, thermal, nuclear, solar, chemical).
- Apply formulas to solve calculation problems related to work, energy, and power.
Materials:
- Whiteboard and markers
- Handouts with key concepts and formulas
- Calculator
- Worksheets for practice problems
- Examples of different energy sources (images or objects)
Lesson Outline:
Introduction (10 minutes):
- Begin with a discussion on the importance of work, energy, and power in everyday life. Ask students for examples of activities that involve work (e.g., lifting a book, running) and energy (e.g., sunlight, food).
- Introduce the focus of the lesson: understanding the concepts of work, energy, and power, their units of measurement, and how to calculate them.
Defining Work, Energy, and Power (15 minutes):
- Work:
- Define work as the product of force applied to an object and the distance the object moves in the direction of the force.
Formula: Work(W)=Force(F)×Distance
Example: Pushing a box across the floor.
- Energy:
- Define energy as the capacity to do work. Discuss different forms of energy such as kinetic energy (energy of motion) and potential energy (stored energy).
- Example: A stretched rubber band (potential energy) vs. a moving car (kinetic energy).
- Power:
- Define power as the rate at which work is done or energy is transferred.
Formula: Power= work done/Time taken
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- Example: A light bulb’s power rating (e.g., 60 watts) indicates how much energy it uses per second.
Units of Measurement (10 minutes):
- Work: Measured in joules (J). 1 joule is equivalent to 1 newton-meter.
- Energy: Also measured in joules (J). Discuss other units like calories (for food energy) or kilowatt-hours (for electrical energy).
- Power: Measured in watts (W), where 1 watt is equivalent to 1 joule per second.
- Provide examples and practice problems where students convert between different units (e.g., converting kilojoules to joules).
ELECTRIC ENERGY J S 3
Identifying Forms of Energy (10 minutes):
- Discuss different forms of energy:
- Heat Energy: Energy that causes a change in temperature.
- Thermal Energy: Related to the temperature of an object.
- Nuclear Energy: Energy stored in the nucleus of an atom, released in nuclear reactions.
- Solar Energy: Energy from the sun.
- Chemical Energy: Energy stored in chemical bonds, released during chemical reactions.
- Use images or objects to illustrate these forms of energy. For example, a battery for chemical energy, a light bulb for electrical energy, and the sun for solar energy.
Applying Formulas to Solve Problems (20 minutes):
- Work through example problems on the board:
- Calculate the work done when a force of 10 newtons moves an object 5 meters.
- Determine the power output if 200 joules of work is done in 10 seconds.
- Distribute worksheets with similar problems for students to solve individually or in pairs.
- Circulate the room to provide assistance and ensure students understand how to apply the formulas.
Conclusion (5 minutes):
- Recap the key concepts of work, energy, and power, their units of measurement, and the different forms of energy.
- Ask a few students to share their solutions to the practice problems and explain their thought process.
Assessment:
- Collect the worksheets and evaluate students’ understanding based on their ability to correctly apply the formulas and solve the problems.
You Can Get Complete Lesson Note Download On Your Phone Now By Click The Link Below For Each Class:
IMPACT BASIC SCIENCE J S 1
IMPACT BASIC SCIENCE J S 2
IMPACT BASIC SCIENCE J S 3
Homework:
- Assign students to research and write a short report on a real-world application of energy and power, such as renewable energy sources (e.g., solar panels) or the energy efficiency of household appliances.
Conclusion:
Wrap up the lesson by emphasizing the significance of understanding work, energy, and power in both academic and real-life contexts, from calculating energy usage to understanding the mechanics of machines and the importance of energy conservation.
