Is it possible that the average velocity for some interval may be zero although the average velocity for a shorter interval included in the first interval is not zero?

Is it possible that the average velocity for some interval may be zero

1.	Is it possible that the average velocity for some interval may be zero although the average velocity for a shorter interval included in the first interval is not zero?
Answer» Solution :Yes. If a particle moves ALONG a straight line with constant 1 st in one direction say in + x direction for some interval of time `Delta t_(1)` then it everses its direction and moves for another time interval `Delta t_(2)` and reaches the same POINT then for total interval `Delta t_(1)+Delta t_(2)` the average velocity is ZERO `(:. (Deltax)/(Deltat)= "O"/(Deltat)=0)`displacement is zero , but for 1st or 2 nd time INTERVALS the average velocity is not zero. Is `(Deltax)/(Deltat)`, the average velocity of the particle during a time interval `vecDeltat` is equal to the slope of the staight line joining initial and final points on the position - time graph.