Introduction
How does a roller coaster move up, down, and still keep going? This PSLE Science roller coaster question tests your understanding of kinetic energy and gravitational potential energy. These energy concepts are common in PSLE exams.
If you master this topic, many PSLE Science questions become easier!
The Question
A roller coaster travels from point A to D.
Students must identify which statement about energy is correct.
This PSLE Science roller coaster question focuses on how energy changes as the car moves along the track.
Step-by-Step Explanation
1️⃣ At higher points
- Roller coaster has more gravitational potential energy (GPE)
- Less kinetic energy
2️⃣ At lower points
- GPE decreases
- Kinetic energy increases
3️⃣ Total energy remains constant
- Energy changes form
- Not lost, just converted
✔ The correct statement compares energy correctly at different points.
✔ The teacher confirms Option 3 is correct.
Key Concepts
Gravitational Potential Energy (GPE)
Energy stored due to height.
Kinetic Energy (KE)
Energy of motion.
Energy Conversion
- GPE → KE when moving down
- KE → GPE when moving up
Tips for Students
✔ Higher position = more GPE
✔ Faster motion = more KE
✔ Energy is conserved
✔ Read diagrams carefully
For Parents
This topic builds:
- Logical reasoning
- Scientific understanding
- Exam confidence
Energy questions appear frequently in PSLE Science.
Conclusion
The PSLE Science roller coaster question teaches students how energy changes forms. Understanding GPE and KE helps students answer confidently.