Rotational Kinematics?

Question

During a tennis serve a racket is given an angular acceleration of magnitude 160rad/s^2. At the top of the serve the racket has an angular speed of 14rad/s. If the distance between the top of the racket and the shoulder is 1.5m find the magnitude of the total acceleration of the top of the racket.

Answer 1

The relationship between linear acceleration a and angular acceleration α is

a = r α

The angular velocity isn't needed to solve this problem.

I will admit that I'm not quite sure what the problem statement means by "total acceleration," though.