Worksheet on charge interactions from The Physics Classroom.

Problem Analysis and Solution

The image contains a worksheet on Charge Interactions in the context of Static Electricity. The task involves understanding the behavior of charged objects and identifying the types of charges based on their interactions. Below is a detailed explanation and solution for each part of the worksheet.

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#### 1. Review:
- Key Concepts:
- Oppositely charged objects attract each other.
- Like-charged objects repel each other.
- A charged object attracts a neutral object.

#### 2. Charge Behavior with Two Balloons:
The worksheet describes three scenarios involving two balloons. We need to analyze the behavior of the balloons and determine the type(s) of charge present.

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##### Scenario 1:
- Observation: Both balloons are attracted to each other.
- Explanation:
- Attraction occurs when one balloon is charged, and the other is neutral (or when both have opposite charges).
- Since the problem does not specify that both balloons are charged, the most straightforward explanation is that one balloon is charged, and the other is neutral.
- Answer:
- One balloon is charged; the other is neutral.

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##### Scenario 2:
- Observation: Both balloons are repelling each other.
- Explanation:
- Repulsion occurs when both balloons have the same type of charge (either both positive or both negative).
- This indicates that both balloons are charged with the same type of charge.
- Answer:
- Both balloons are charged with the same type of charge.

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##### Scenario 3:
- Observation: One balloon is charged, and the other is neutral.
- Explanation:
- When one balloon is charged and the other is neutral, the charged balloon will attract the neutral balloon due to induction (the neutral balloon becomes polarized, and its opposite charge is attracted to the charged balloon).
- This scenario directly matches the observation.
- Answer:
- One balloon is charged; the other is neutral.

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#### 3. Forces Occur in Pairs:
The final statement at the bottom of the worksheet emphasizes an important principle in physics:
- Forces occur in pairs.
- This refers to Newton's Third Law of Motion: "For every action, there is an equal and opposite reaction."
- In the context of electrostatic forces, if one charged object exerts a force on another, the second object exerts an equal and opposite force back on the first.

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Final Answer:

Summarizing the answers to each part:

1. Oppositely charged objects attract.
2. Like-charged objects repel.
3. A charged object attracts a neutral object.

For the scenarios:
- Scenario 1: One balloon is charged; the other is neutral.
- Scenario 2: Both balloons are charged with the same type of charge.
- Scenario 3: One balloon is charged; the other is neutral.

The final boxed answer is:

\[
\boxed{\text{One balloon is charged; the other is neutral.}}
\]