Practical Examples and Demonstrations of Energy and Work - JSS2 Basic technology Lesson Note

Example 1: Lifting Weights

• Activity: Lift a weight from the ground to a certain height.
• Explanation: This involves doing work against gravity, converting muscular energy into gravitational potential energy.

Example 2: Rolling a Ball

• Activity: Push a ball across the floor.
• Explanation: Applying a force to move the ball does work, converting the applied force into kinetic energy, making the ball move.

Example 3: Heating Water

• Activity: Boil water using an electric kettle.
• Explanation: Electrical energy is converted into thermal energy, raising the water temperature until it boils.

Example 4: Stretching a Spring

• Activity: Compress or stretch a spring.
• Explanation: Work is done on the spring, converting kinetic energy into elastic potential energy stored in the spring.

Example 5: Using a Battery

• Activity: Power a flashlight with a battery.
• Explanation: Chemical energy in the battery is converted into electrical energy, which is then converted into light and thermal energy by the flashlight.