Explain the terms , velocity and instantaneous velocity. When are they equal?

A particle is moving with a constant speed in a circular path. Find the ratio of average velocity to its instantaneous velocity when the particle rotates an angle theta =((pi)/(2)) .

When a particle moves with constant velocity, its average velocity, its instantaneous velocity and its speed are all equal. Comment on this statement.

If the object is moving with uniform velocity in a given interval of time, then the average speed and instantaneous velocity are equal, why?

Assertion: Average speed of a particle in a given time interval is never less than the magnitude of the average velocity. Reason: The magnitude of the velocity (instantaneous velocity) of a particle is equal to its speed.

When a particle moves with constant velocity its average velocity, its instantaneous velocity and its speed all are equal. Is this statement true or false ?

Assertion: When a particle moves with constant velocity its average velocity, its insttantaneous velocity and its speed are all equal in magnitude. Reason: If the average velocity of a particle moving on a straight line is zero in a time interval, then it is possible that the instantaneous velocity is never zero in the internal.

What is the difference between average velocity and instantaneous velocity?

How is average velocity different from instantaneous velocity ?

Define the term velocity ratio. State its unit.

What is the angle between frictional force and instantaneous velocity of the body moving over a rough surface ?