Constant Speed and Average Speed differ fundamentally in how speed is measured and maintained over a journey.

1. Constant Speed refers to maintaining the same speed throughout an entire journey. If a car, for example, drives at a constant speed of 60 km/h, it means it doesn’t slow down or speed up at any point—it keeps moving at exactly 60 km/h for the whole trip.

2. Average Speed is the total distance traveled divided by the total time taken, regardless of any variations in speed during the journey. Even if you change speeds along the way—perhaps stopping at traffic lights or accelerating on the highway—average speed represents your speed as if you had traveled at one steady pace.

Example:

Imagine your last trip from your previous class to this one:

• Constant Speed Example: If you walked at a steady pace of 4 km/h without any pauses or changes in speed, then you moved at a constant speed.

• Average Speed Example: Let’s say you traveled 2 kilometers from your previous class to this one, but along the way, you paused twice for one minute each and adjusted your speed. If it took you a total of 40 minutes to complete the journey, your average speed would be:

  $\text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} = \frac{2 \text{ km}}{40 \text{ minutes}} = 3 \text{ km/h}$

Here, even though you varied your speed and took short breaks, your average speed reflects the total distance covered over the entire time taken.

Would you like further details on any part of this?

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Questions:

1. How does constant speed affect travel time compared to variable speed?
2. What factors can influence average speed on a journey?
3. How can you calculate the distance if you know average speed and time?
4. Why might average speed be more useful than constant speed in real-world scenarios?
5. How does stopping affect the calculation of average speed?

Tip:

For accurate average speed, always include all time spent, including pauses, in the total time calculation.