A solid disk of mass and radius spins at

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

Problem

A solid disk of mass

4.0\,\text{kg}

and radius

0.30\,\text{m}

spins at

120\,\text{rad}\,\text{s}^{-1}

. A constant frictional torque of

0.60\,\text{N}\,\text{m}

opposes the motion. Approximately how long will it take for the disk to come to rest? (a)

18\,\text{s}

(b)

36\,\text{s}

(c)

29\,\text{s}

(d)

72\,\text{s}