Question

A student runs $120\text{m}$ around a circular track of $40\text{m}$ radius. What is her angular displacement?

• A. 1 rad
• B. 2 rad
• C. 3 rad
• D. 4 rad

Answer 1

The correct option is C 3 rad

We know that,

$l=r\theta$

$\text{Angle}=\frac{\text{Arc length}}{\text{Radius}}$
$=\frac{120}{40}$

= 3 rad