Educational worksheet on potential and kinetic energy transformations using real-world examples like a balloon, a rolling ball, and a roller coaster.

Here's the complete solution and explanation for the worksheet “PE and KE Energy Transformations”.

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## 🎈 Part 1: Inflated Balloon

> The inflated balloon has ______________.
> As air leaves the balloon, this energy becomes ______________.

✔ Answers:

- The inflated balloon has potential energy (PE).
- As air leaves the balloon, this energy becomes kinetic energy (KE).

🔍 Explanation:

When you inflate a balloon, you stretch its rubber and compress the air inside — storing elastic potential energy (a form of PE). When you release it, the air rushes out, pushing the balloon forward — converting that stored PE into motion, which is kinetic energy (KE).

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## ⚽ Part 2: Ball Rolling Down and Up Hills

> Based on the picture, where does the ball have:

*(Points labeled A–G on a curved track with horizontal lines indicating height levels)*

✔ Answers:

- Greatest kinetic energy → D
- Greatest potential energy → A or G *(both at same highest level)*
- Some KE and some PE → B, C, E, F
- Least amount of PE → D
- Least amount of KE → A or G

🔍 Explanation:

- Potential Energy (PE) depends on height — higher = more PE.
- Kinetic Energy (KE) depends on speed — faster = more KE.
- At the highest points (A and G), the ball momentarily stops (or moves very slowly), so it has maximum PE and minimum KE.
- At the lowest point (D), the ball is moving fastest, so it has maximum KE and minimum PE.
- At intermediate points (B, C, E, F), the ball has some of both — it’s neither at max height nor max speed.

> 💡 Note: Since A and G are at the same height, they have equal PE. So either can be chosen for “greatest PE” or “least KE”. But since the question asks “where”, and both are valid, you might list both — but typically in such worksheets, A is used as the starting point.

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## 🎢 Part 3: Roller Coaster Car – Order from Most PE to Least PE

> Order the locations from Most PE to Least PE:

*(Points labeled 1, 2, 3, 4, 5 on a roller coaster track)*

✔ Answer:

1) Most PE → 1
2) 2nd most → 3
3) 3rd most → 5
4) 4th most → 2
5) Least PE → 4

🔍 Explanation:

Potential energy (PE) is directly related to height above ground.

Looking at the roller coaster diagram:

- Point 1: Highest hill → most PE
- Point 3: Loop — top of loop is high, but not as high as point 1 → 2nd most PE
- Point 5: Smaller hill — lower than 1 and 3 → 3rd most PE
- Point 2: Valley after first hill — low, but higher than bottom → 4th most PE
- Point 4: Lowest point — bottom of dip → least PE

> 📌 Tip: Even though point 3 is part of a loop, we consider the *height of the car* at that location. The top of the loop is higher than point 5, but lower than point 1.

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## ✔ Final Answer Summary:

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🎈 Balloon:

- The inflated balloon has potential energy.
- As air leaves the balloon, this energy becomes kinetic energy.

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⚽ Ball on Hills:

- Greatest kinetic energy → D
- Greatest potential energy → A (or G)
- Some KE and some PE → B, C, E, F
- Least amount of PE → D
- Least amount of KE → A (or G)

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🎢 Roller Coaster (Most PE to Least PE):

1) 1
2) 3
3) 5
4) 2
5) 4

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Let me know if you’d like a printable version or visual annotations! 😊