Average Velocity and Displacement of a Body Moving in a Horizontal Circular Circle with Constant Speed

When a body moves in a circular path with constant speed, it experiences a centripetal force that is directed towards the center of the circle. The velocity of the body is always tangent to the circle, and it changes constantly in direction as the body moves along the path.

Average Velocity
The average velocity of the body moving in a circular path with constant speed is zero. This is because the body returns to its starting point after completing one full circle. Therefore, the displacement of the body is zero, and the average velocity is also zero.

Displacement
The displacement of the body moving in a circular path with constant speed is also zero. This is because the displacement is the shortest distance between the starting point and the ending point. In this case, the starting and ending points are the same, and therefore, the displacement is zero.

Instantaneous Velocity
The instantaneous velocity of the body moving in a circular path with constant speed is always tangent to the circle. It is perpendicular to the centripetal force that is directed towards the center of the circle. The magnitude of the instantaneous velocity is equal to the speed of the body.

Conclusion
In conclusion, when a body moves in a circular path with constant speed, its average velocity and displacement are both zero. The instantaneous velocity of the body is always tangent to the circle, and its magnitude is equal to the speed of the body.

As the body is moving in horizontal circle so after completing one rotation it will come to it's initial position , thus its displacement is 0.

In uniform circular motion, average velocity = distance covered by the body ÷ time taken
Therefore, average velocity in this case is 2πr ÷ time taken to cover it .