An object moving along a straight line with a constant speed is said to be in _____

Explanation

**Step-by-Step Solution:**

1. **Understanding Speed**:
- Speed is defined as the distance traveled per unit time. It tells us how fast an object is moving.
- Formula: Speed = Distance / Time.

2. **Defining Constant Speed**:
- Constant speed means that the speed of the object does not change over time.
- For example, if an object travels 5 meters every second, it maintains this speed consistently.

3. **Understanding Motion**:
- Motion refers to the change in position of an object with respect to time.
- When an object moves in a straight line and covers equal distances in equal intervals of time, it is said to be in uniform motion.

4. **Conclusion**:
- Therefore, an object moving along a straight line with a constant speed is said to be in **uniform motion**.

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