Suppose the position vector for a particle is given as a function of time by r(t) = x(t)i + y(t)j, with x(t) = at + b and y(t) = ct2 + d, where a = 1.10 m/s, b = 1.05 m, c = 0.124 m/s2, and d = 1.16 m. (a) Calculate the average velocity during the time interval from t = 2.25 s to t = 3.85 s. V = m/s (b) Determine the velocity at t = 2.25 s. V m/s Determine the speed at t = 2.25 s. m/s Need Help? Read It