A model train moves 18.3 m in 122 s. What is the average speed?
Understand the Problem
The question is asking for the average speed of a model train that travels 18.3 meters in 122 seconds. To solve this, we can use the formula for average speed, which is total distance divided by total time.
Answer
The average speed is approximately $0.15 \text{ m/s}$.
Answer for screen readers
The average speed is approximately $0.15 \text{ m/s}$.
Steps to Solve
- Identify the formula for average speed
To find the average speed, we use the formula:
$$ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} $$
- Substitute the given values
In this case, the total distance is 18.3 meters and the total time is 122 seconds. So we substitute these values into the formula:
$$ \text{Average Speed} = \frac{18.3 \text{ m}}{122 \text{ s}} $$
- Perform the calculation
Now, we need to calculate the average speed:
$$ \text{Average Speed} = \frac{18.3}{122} \approx 0.1508 \text{ m/s} $$
- Round the result
Depending on the context, we can round the speed to two decimal places, which gives us:
$$ \text{Average Speed} \approx 0.15 \text{ m/s} $$
The average speed is approximately $0.15 \text{ m/s}$.
More Information
The average speed is a measure of how fast an object is moving over a specific distance and time. In this case, the model train moves relatively slowly compared to typical speeds of vehicles.
Tips
- Ignoring units: Always make sure to include the units for speed (m/s) when calculating.
- Rounding too early: Ensure to finish the calculation fully before rounding to avoid inaccuracies.