Can the instantaneous velocity of an object during a time interval ever be greater in magnitude than average celocity over the entire interval ? Can it be less?

If magnitude of average speed and average velocity over a time interval are same, then

If the average velocity of an object is zero in some time interval , what can you say about the displacement of the object for that interval?

Assertion : The average speed of an object is greater than or equal to the magnitude of the average velocity over a given time interval. Reason : The two are equal only if the path length is equal to the magnitude of displacement.

Assertion: The average velocity of a particle is zero in a time interval. It is possible that the instantaneous acceleration is never zero in the interval. Reason: The magnitude of average velocity in an interval is equal to its average speed in that interval.

Can the instantaneous power output of an ac source ever be negative ? Can the average power output be negative ?

Assertion: The magnitude of average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval. Reason: Path length (distance) is either equal or greater than the magnitude of displacement.

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.

If the displacement of an object during its motion is 100 m in a time interval of 20 s, then calculate the average velocity of the object with which it was moving through out his journey.

Assertion : The instantaneous velocity is given by the limiting value of the average velocity as the time interval approaches zero. Reason : The direction of the average velocity is same as that of displacement.

The velocity-time graph of an object is given below. Calculate the average acceleration of the object in the time interval of 4 s to 6 s.