Physics

Problem

A uniform rod

0.90\,\text{m}

long pivots about one end and rotates in a horizontal plane. At a particular instant its angular speed is

3.0\,\text{rad}\!/\!\text{s}

and its angular acceleration is

2.0\,\text{rad}\!/\!\text{s}^{2}

, both counterclockwise. Three small beads are fixed to the rod at distances

0.30\,\text{m}

(P),

0.60\,\text{m}

(Q), and

0.90\,\text{m}

(R) from the pivot. Which ranking correctly orders the magnitudes of their tangential accelerations from greatest to least? a)

P > Q > R

R = Q > P

R > Q > P

P = Q = R