๐ฎ Interactive Work & Energy Games
๐ Energy Detective
Identify different types of energy in various situations!
โก Work Calculator Challenge
Calculate work done and energy transformations!
๐ Energy Transformation Matcher
Match energy transformations in different scenarios!
๐ฑ How to play: Tap a scenario to select it, then tap the correct energy transformation!
Energy Scenarios
Energy Transformations:
๐ Work and Energy Concepts
๐ช What is Work?
Work is done when a force acts on an object and causes it to move in the direction of the force. Work is a scalar quantity measured in Joules.
Key Concepts:
- Definition: Work = Force ร Distance (in direction of force)
- Formula: W = F ร d ร cos ฮธ
- Unit: Joule (J) = Newton-meter (Nโ m)
- Conditions: Force must cause displacement
- No Work: When force is perpendicular to motion
โก What is Energy?
Energy is the capacity to do work. It exists in various forms and can be transformed from one form to another, but the total energy in a closed system remains constant.
Energy Fundamentals:
- Definition: Capacity to do work
- Unit: Joule (J), same as work
- Nature: Scalar quantity
- Conservation: Energy cannot be created or destroyed
- Transformation: Can change from one form to another
๐ Types of Energy
Kinetic Energy
Energy possessed by moving objects
- โข Formula: KE = ยฝmvยฒ
- โข Depends on: Mass and velocity
- โข Examples: Moving car, flowing water, flying bird
- โข Increases: With speed (velocity squared)
Potential Energy
Stored energy due to position or condition
- โข Gravitational PE: PE = mgh
- โข Elastic PE: Stored in stretched/compressed objects
- โข Examples: Water in dam, stretched spring, raised hammer
- โข Depends on: Height, mass, gravity
Mechanical Energy
- โข Definition: Sum of kinetic and potential energy
- โข Formula: ME = KE + PE
- โข Conservation: Remains constant in ideal conditions
- โข Examples: Pendulum, roller coaster, bouncing ball
Heat Energy
- โข Energy due to molecular motion
- โข Produced by friction, combustion
- โข Flows from hot to cold objects
- โข Examples: Fire, sun, friction heating
Light Energy
- โข Electromagnetic radiation energy
- โข Travels at speed of light
- โข Can be converted to other forms
- โข Examples: Sun, bulbs, laser, fire
Sound Energy
- โข Energy carried by sound waves
- โข Produced by vibrating objects
- โข Travels through matter (not vacuum)
- โข Examples: Music, speech, thunder
Electrical Energy
- โข Energy from moving electric charges
- โข Powers electronic devices
- โข Can be easily converted to other forms
- โข Examples: Batteries, power plants, lightning
๐ Energy Transformations
Common Energy Conversions:
๐ฅ Burning fuel: Chemical โ Heat + Light
๐ก Electric bulb: Electrical โ Light + Heat
๐ฑ Photosynthesis: Light โ Chemical
๐ Battery: Chemical โ Electrical
๐ธ Guitar: Mechanical โ Sound
Energy Conservation Examples:
๐ฏ Pendulum: PE โ KE (back and forth)
๐ข Roller coaster: PE at top โ KE at bottom
๐ Bouncing ball: KE โ PE โ KE
๐ง Hydroelectric: PE of water โ KE โ Electrical
๐ Wind turbine: KE of wind โ Electrical
๐ Work-Energy Theorem
Key Principle:
The work done on an object equals the change in its kinetic energy.
W = ฮKE = KEfinal - KEinitial
Applications:
- Calculating work needed to accelerate objects
- Understanding braking distances
- Analyzing collision impacts
- Designing safety systems
๐ Real-World Applications
Energy in Technology:
๐ Hybrid cars: Convert braking energy back to electrical energy
โ๏ธ Solar panels: Convert light energy to electrical energy
๐ Wave power: Convert wave motion to electrical energy
๐ Power banks: Store electrical energy chemically
Energy in Sports:
๐น Archery: Elastic PE in bow โ KE of arrow
๐ Swimming: Chemical energy โ Mechanical work
๐ด Cycling: Muscular work โ KE of bicycle
๐ Basketball: Work done lifting ball โ PE โ KE
๐ Work & Energy Flashcards
Tap on cards to flip them and test your knowledge!
โ๏ธ Interactive Energy Activities
๐ฌ Energy Transformation Lab
Observe different energy transformations in action!
Select Energy Demonstration:
Energy Demonstration:
Select an energy demonstration to see it in action!
Choose an energy demonstration above to see how energy transforms!
๐ Work & Energy Calculator
Calculate work done and different types of energy!
Select Calculation Type:
Select a calculation type to use the calculator!
๐ Work & Energy Worksheets
๐ Knowledge & Understanding Worksheet
Test your basic knowledge about work and energy (Bloom's: Remember & Understand)
1. Fill in the blanks:
Work is done when a _______ acts on an object and causes it to move in the _______ of the force.
The SI unit of work and energy is _______.
Kinetic energy formula is KE = ยฝ ร _______ ร _______ยฒ.
2. Multiple Choice:
Which of the following has the highest kinetic energy?
Potential energy depends on:
When is no work done?
๐ฌ Analysis & Application Worksheet
Apply your knowledge to solve real-world work and energy problems (Bloom's: Apply & Analyze)
Problem Solving:
A 2 kg ball is thrown upward with a velocity of 10 m/s. Calculate its kinetic energy at the moment of throw and its potential energy at maximum height. (g = 10 m/sยฒ)
Energy Analysis Challenge:
4. Analyze the energy transformations in these situations:
a) A pendulum swinging back and forth:
b) A roller coaster at different points:
c) A compressed spring being released: