I can get the first part, but I am getting tripped up on the second part. A 220 kg boat is negotiating a circular turn (radius=32m) around a buoy. During the turn, the engine causes a net tangetntial force of magnitude 550N to be applied to the boat. The initial tangential speed of the boat going around the turn is 5.0 m/s a)find the tangential acceleration b)after the boat is 2.0 s into the turn find the centripetal acceleration. So for part a) F=mr(alpha) (alpha=angular acceleration, I can't make the symbol) alpha= .078 rad/s^2 Tang. acceleration= r(alpha)= 2.5 m/s^2 I am stuck on part b, I think the fact that I am given the initial tangential speed. So do I find the final and take the average?