During a lab

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

During a lab, the positive rotational direction is initially defined as clockwise. Just before the sign convention is changed, a disk has an angular velocity of +4 rad/s+4\,\text{rad/s} under that original convention. Immediately after switching to the more common convention that takes counterclockwise as positive, what angular velocity should be recorded for the disk, assuming its physical motion is unchanged? (a) +4 rad/s+4\,\text{rad/s} (b) −2π rad/s-2\pi\,\text{rad/s} (c) −4 rad/s-4\,\text{rad/s} (d) 0 rad/s0\,\text{rad/s}

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