Equations 2.13-2.17 in section 2.6 are derived for the case of a constant acceleration. Suppose that we had an object with an acceleration that increased linearly with time, i. e. a(t) = a0 t. Which of the equations below is not one of the equations of motion for this case? a. v = v0 + ½ a0 t2 b. x = x0 + v0 t + 1/6 a0 t3 c. vf2 = vi2 + 2 a0 ( xf - xi ) d. All of the above are correct equations of motion for this case.