A wheel of radius is set into rotation from rest with a constant angular acceleration of

PHYSICS · Single correct · AP · Physics C: Mechanics · Torque and Rotational Dynamics · Torque and Rotational Dynamics

Problem

A wheel of radius

0.50\,\text{m}

is set into rotation from rest with a constant angular acceleration of

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

. After how much time will the magnitudes of tangential and centripetal accelerations of a point on the rim become equal? (a)

1.00\,\text{s}

(b)

0.50\,\text{s}

(c)

0.25\,\text{s}

(d)

0.71\,\text{s}