A turntable’s angular velocity varies with time as follows: it increases uniformly…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Torque and Rotational Dynamics · Torque and Rotational Dynamics

Problem

A turntable’s angular velocity

\omega

varies with time as follows: it increases uniformly from

0\,\text{rad/s}

t=0\,\text{s}

20\,\text{rad/s}

t=2\,\text{s}

, remains constant at

20\,\text{rad/s}

until

t=4\,\text{s}

, and then decreases uniformly to

0\,\text{rad/s}

t=6\,\text{s}

. For a point located

0.10\,\text{m}

from the axis, during which time interval is the tangential component of acceleration equal to zero? (a) from

t=0\,\text{s}

t=2\,\text{s}

only (b) throughout the entire

0

–

6\,\text{s}

interval (c) from

t=2\,\text{s}

t=4\,\text{s}

only (d) from

t=4\,\text{s}

t=6\,\text{s}

only