An object undergoes uniformly accelerated motion from point x1 = 4 m at time t1 = 2 s to point x2 = 40 m at time t2 = 7 s.
(a) If the magnitude of the instantaneous velocity at t1 is v1 = 3 m/s, what is the instantaneous velocity v2 at time t2?
(b) Determine the magnitude of the instantaneous acceleration of the object at time t2.