Which expression correctly relates the arc length traveled by a point on a rigid disk…

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

Problem

Which expression correctly relates the arc length

s

traveled by a point on a rigid disk to its distance

r

from the rotation axis and its angular displacement

\theta

(in radians)? (a)

s = \dfrac{r}{\theta}

(b)

s = r\theta

(c)

s = \left(\dfrac{\pi}{180}\right) r\theta

(d)

s = r\theta^{2}