Question 23M.1A.SL.TZ1.5

A car accelerates uniformly. The car passes point X at time t₁ with velocity v₁ and point Y at time t₂ with velocity v₂. The distance XY is s.

The following expressions are proposed for the magnitude of its acceleration a:

I.    $a=\frac{2s}{{(t_2-t_1)}^2}$

II.   $a=\frac{{v_2}^2-{v_1}^2}{2s}$

III.  $a=\frac{v_2-v_1}{t_2-t_1}$

Which is correct?

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III