Which of these actions could lead to the pro-duction of sound ?

Options

A. Movement of a car on a straight road
B. Periodic movement of the hands of a clock
C. Vibration of a stretched rubber band upon plucking it
D. Spinning or rotational motion of planet earth about its axis

Answer

To determine which of the given actions could lead to the production of sound, we need to analyze each action based on the principle that sound is produced by vibrations. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Sound Production**:
- Sound is produced when an object vibrates. These vibrations create waves in the air (or another medium), which we perceive as sound.

2. **Analyzing the Movement of a Car on a Straight Road**:
- When a car moves in a straight line, it does not inherently produce sound. The movement itself does not involve vibrations that create sound waves.
- **Conclusion**: This action does not produce sound.

3. **Periodic Movement of Hands of a Clock**:
- The hands of a clock move in a circular path. Although this movement is periodic, it does not involve the back-and-forth vibrations necessary for sound production.
- **Conclusion**: This action does not produce sound.

4. **Vibration of a Stretched Rubber Band Upon Plucking It**:
- When a rubber band is plucked, it vibrates back and forth from its resting position. This vibration creates sound waves in the air.
- **Conclusion**: This action produces sound.

5. **Rotational Motion of Planet Earth About Its Axis**:
- The Earth’s rotation is a continuous motion and does not involve vibrations. Therefore, it does not produce sound.
- **Conclusion**: This action does not produce sound.

### Final Answer:
The only action that leads to the production of sound is the **vibration of a stretched rubber band upon plucking it**.

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