A wheel is initially rotating at in the anticlockwise sense

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

Problem

A wheel is initially rotating at

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

in the anticlockwise sense. It is subjected to a constant angular acceleration of

-4\,\text{rad}\,\text{s}^{-2}

. How much time will it take for the wheel to come to rest? (a)

4\,\text{s}

(b)

10\,\text{s}

(c)

5\,\text{s}

(d)

2.5\,\text{s}