A fly-wheel has an initial angular speed of and is subjected to a constant angular…

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

Problem

A fly-wheel has an initial angular speed of

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

and is subjected to a constant angular acceleration of

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

. How much time does it take to turn through

20\,\text{rad}

starting from the given speed? (a)

3.3\,\text{s}

(b)

2.0\,\text{s}

(c)

2.4\,\text{s}

(d)

3.0\,\text{s}