A ball starts from rest and moves horizontally. Six positions of the ball are shown at time intervals of 1.0 ms. The horizontal distance between X, the initial position, and Y, the final position, is 0.050 m.

What is the average acceleration of the ball between X and Y?

A.     2000 m s^–2

B.     4000 m s^–2

C.     5000 m s^–2

D.     8000 m s^–2

B