A wheel starts from rest and its angular velocity varies with time according to

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

\omega=(3.0\,\text{rad/s}^2)\,t+2.0\,\text{rad/s}

. What is the linear speed of a point located

0.15\,\text{m}

from the axis at

t=4.0\,\text{s}

? (a)

1.8\,\text{m/s}

(b)

14\,\text{m/s}

(c)

2.1\,\text{m/s}

(d)

1.2\,\text{m/s}