Question 942123
a) 

*[tex \large a(t) = a_0 + \int_{0}^{t} J \, dt' = a_0 + Jt]


*[tex \large v(t) = v_0 + \int_{0}^{t} a(t) \, dt' = v_0 + a_0t + \frac{1}{2}Jt^2]


*[tex \large x(t) = x_0 + \int_0^{t} v(t) \, dt' = x_0 + v_0t + \frac{1}{2}a_0t^2 + \frac{1}{6}Jt^3]


b) You should specify what a_2 is. Not clear to us.