# Average Velocities: Constant Speed on Circular Path

In summary, average velocity is defined as the net displacement divided by the time. If an object is moving at a constant speed on a circular path, the average velocity is zero every time the object returns to the starting point. However, the average speed is not zero. It is common for people to confuse the two concepts.
I have a question about average velocity. It's defined as the net displacement divided by the time. So if I have an object moving at a constant speed on a circular path, is the average velocity zero every time the object returns to the starting point? My reasoning is that the net displacement is zero.

Yes that's right. The average velocity is zero. But the average speed is not.

Thaakisfox said:
Yes that's right. The average velocity is zero. But the average speed is not.

Ok, that's what I thought. My professor worked out a problem where the object returned to the starting point, and claimed a value for the average velocity. I think she meant average speed and left me confused.

Well yes, that is a common mistake ;)

## 1. What is average velocity?

Average velocity is the average rate at which an object changes its position over a certain amount of time. It is calculated by dividing the change in position by the change in time.

## 2. How is average velocity different from instantaneous velocity?

Average velocity is the overall measure of an object's speed and direction over a period of time, while instantaneous velocity is the speed and direction of an object at a specific moment in time.

## 3. Can an object have a constant speed but varying average velocity on a circular path?

Yes, an object can have a constant speed but varying average velocity on a circular path. This is because average velocity takes into account the direction of the object's motion, which can change even if the speed remains constant on a circular path.

## 4. How is the average velocity on a circular path calculated?

The average velocity on a circular path is calculated by dividing the circumference of the circle by the time it takes for the object to complete one full revolution.

## 5. What is the effect of increasing the radius of a circular path on the average velocity?

Increasing the radius of a circular path will result in a decrease in the average velocity of an object. This is because the distance the object needs to travel to complete one full revolution increases, while the time it takes remains constant, resulting in a lower average velocity.

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