Chapter 2, Problem 74PQ

(a)

To determine

Whether the object is travelling and time $\frac{T}{2}$ is elapsed, the distance travelled will be less than, greater than or equal to $\frac{d}{2}$.

(b)

To determine

Whether the instantaneous velocity of object is less then, greater than or equal to $v_{av}$ when object is crossed a distance $\frac{d}{2}$.