A large stone disk is viewed from above and is initially at rest as seen in the figure below. The disk has a mass of 135.0 kg and a radius of 1.900 m. A constant force of 40.0 N is applied tangent to the edge of the disk for 61.0 s, causing the disk to spin around the z axis. .V F=40.0N (a) Calculate the angular acceleration of the stone, finding both the direction and magnitude. (Express your answer in vector form. Substitute numeric values, do not use variables.) a a = 0.311} rad/52 X (b) What is the fina angular velocity of the stone? (Express your answer in vector form. Substitute numeric values, do not use variables.) _. w = 19.025} rad/s X