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?