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Energy Transfer Model Investigation
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Energy Transfer Model Investigation
⚡ Part 1: Energy Stores and Transfers
1. Circle the correct definition of gravitational potential energy:
Energy stored in moving objects
Energy stored in objects due to their position above the ground
Energy stored in stretched springs
Energy stored in hot objects
2. Which of the following are examples of energy dissipation? (Tick all that apply)
Heat produced by friction
Sound made by moving objects
Light from the sun
Air resistance slowing down a car
3. Complete the energy transfer equation:
Gravitational Potential Energy = _______ × _______ × _______
(Use the symbols: m, g, h)
🔬 Part 2: Experimental Setup and Predictions
4. Draw a labelled diagram of your ramp experiment setup. Include the ball, ramp, and measurement points:
5. Record your experimental measurements:
Mass of ball (kg): _______________
Height of ramp (m): _______________
Angle of ramp (°): _______________
Length of ramp (m): _______________
6. Predict what will happen to the ball's energy as it rolls down the ramp:
📊 Part 3: Data Collection and Calculations
7. Complete the energy calculations table:
At the top of ramp:
Gravitational PE = m × g × h = _______ × 9.8 × _______ = _______ J
Kinetic Energy = _______ J (ball is stationary)
At the bottom of ramp:
Gravitational PE = _______ J (height = 0)
Kinetic Energy = ½ × m × v² = _______ J
8. Calculate the efficiency of your energy transfer system:
9. What evidence did you observe for energy dissipation during the experiment?
The ramp felt warm after multiple trials
Sound was produced as the ball rolled
The ball's final kinetic energy was less than initial potential energy
Air resistance slowed the ball
🌍 Part 4: Real-World Applications
10. Match each real-world system with its main energy dissipation mechanism:
1. Car brakes
2. Roller coaster
3. Wind turbine
4. Bicycle chain
A. Air resistance and friction in bearings
B. Heat from friction between brake pads
C. Sound and heat from metal-on-metal contact
D. Air resistance and track friction
11. Explain how understanding energy transfer helps engineers design more efficient machines:
12. Suggest three ways to reduce energy loss in your ramp experiment:
1. _________________________________________________
2. _________________________________________________
3. _________________________________________________
🎯 Part 5: Evaluation and Conclusion
13. Circle the statement that best describes energy efficiency:
The total amount of energy in a system
The ratio of useful energy output to total energy input
The speed at which energy is transferred
The amount of energy lost as heat
14. Evaluate the limitations of your experimental model compared to real-world energy transfer systems:
15. Research Extension: Choose one energy-efficient technology (e.g., hybrid cars, LED lights, heat pumps) and explain how it minimises energy dissipation:
Technology chosen: _________________________________
How it reduces energy loss:
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