A wheel starts from rest and rotates through an angle in time under constant angular…

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

Problem

A wheel starts from rest and rotates through an angle

\theta

in time

t

under constant angular acceleration

\alpha

. If the angular acceleration is increased to

4\alpha

, the time taken to rotate through the same angle

\theta

will be (a)

\dfrac{t}{\sqrt{2}}

(b)

\dfrac{t}{4}

(c)

\dfrac{t}{2}

(d)

\dfrac{t}{2\sqrt{2}}