Question

Rohit bought a pizza of radius $0.5m$. A fly lands on the pizza and walks around the edge for a distance of $80cm$. The angular displacement of the fly is

• A. $0.2radians$
• B. $0.32radians$
• C. $0.16radians$
• D. $0.6radians$

Answer 1

The correct option is C $0.16radians$

According to the question, the distance travelled by the fly around the edge of the pizza is $s=80cm=0.08m$.
The radius of the pizza is given to be $r=0.5m$.
Using the formula for angular displacement, we get
$\theta =\frac{s}{r}$
$\Rightarrow \theta =\frac{0.08m}{0.5m}$
$\Rightarrow \theta =0.16radians$