(10.8) A uniform disk with mass 40.1 kg and radius 0.260 m is pivoted at its center about a horizontal, frictionless axle that is stationary. The disk is initially at rest, and then a constant force 30.5 N is applied tangent to the rim of the disk.
a. What is the magnitude v of the tangential velocity of a point on the rim of the disk after the disk has turned through 0.260 revolution? 1.14 m/s
b. What is the magnitude a of the resultant acceleration of a point on the rim of the disk after the disk has turned through 0.260 revolution? 5.20 m/s2