A circular saw blade 0.200 m in diameter starts from rest. In 6.00 s it accelerates with constant angular acceleration to an angular velocity of 140 rad/s. Find the angular acceleration and the angle through which the blade has turned.

Solution 14E Introduction The initial and final angular velocity of the disk is given, and the time is given. We have to calculate the angular acceleration and the total angle covered by the disc. Step 1 The angular acceleration is given by Here we know that i 0 f 140 rad/s And t = 6.00 s. Hence the angular acceleration is 2 So the angular acceleration of the saw blade is 23.3 rad/s .