# What Speed is the Racecar Moving?

• dmolson
In summary, the speed of a racecar can be calculated by dividing the distance traveled by the time it took to travel that distance. This speed is not constant and can vary depending on external factors. Racecars can reach speeds of 200-300 mph, which is much faster than the average passenger vehicle on the road. The speed of a racecar is important as it can determine the outcome of a race and reflects the performance and capabilities of the car and driver. It can also be measured in different units such as mph, km/h, and m/s.
dmolson
The pitch of the sound from a racecar engine drops the musical interval of a fourth when it passes the spectators. This means the frequency of the sound after passing is 0.75 times what it was before. How fast is the racecar moving?

a. 68 m/s
b. 49 m/s
c. 61 m/s
d. 72 m/s

I cannot figure out how to work this problem out, any help would be great. Thanks in advance.

Think of what formulae that comes to your mind when you do this question.

## 1. How do you calculate the speed of a racecar?

The speed of a racecar can be calculated by dividing the distance traveled by the time it took to travel that distance. This is represented by the formula: speed = distance/time.

## 2. Is the speed of a racecar constant?

No, the speed of a racecar is not constant. It can vary depending on external factors such as track conditions, weather, and driver performance.

## 3. How does the speed of a racecar compare to other vehicles?

The speed of a racecar can vary greatly depending on the type of racecar and the type of race. On average, racecars can reach speeds of 200-300 mph, which is much faster than the average passenger vehicle on the road.

## 4. Why is the speed of a racecar important?

The speed of a racecar is important because it can determine the outcome of a race. It also reflects the performance and capabilities of the car and driver.

## 5. Can the speed of a racecar be measured in different units?

Yes, the speed of a racecar can be measured in different units such as miles per hour (mph), kilometers per hour (km/h), and meters per second (m/s). It is important to use the appropriate units when comparing speeds or making calculations.

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