Consider a particle moving along the circumference of a circle of radius R with constant speed with a time period T. During T, what is the distance and displacement covered?

Consider a particle moving along the circumference of a circle of radius R with constant speed with a time period T. What is the direction of the velocity at each point?

A car is moving along the circumferance of a circle of radius r . a)What is the distance travelled in one revolution? b)What is the displacement in one revolution? c)What does the speedometer of the car measure? d)Can a body have acceleration without velocity.Explain.

If the distance covered by a particle is zero then what can we say about its displacement.