You’ve been assigned the task of using a shaft encoder—a device that measures the angle of a shaft or axle and provides a signal to a computer—to analyze the rotation of an engine crankshaft under certain conditions. The table lists the crankshaft’s angles over a 0.6 s interval.

Time (s) _____________ Angle (rad)

0.0 ………………………. 0.0

0.1 ………………………. 2.0

0.2 ………………………. 3.2

0.3 ………………………. 4.3

0.4 ………………………. 5.3

0.5 ………………………. 6.1

0.6 ………………………. 7.0

Is the crankshaft rotating with uniform circular motion? If so, what is its angular velocity in rpm? If not, is the angular acceleration positive or negative?