# Question #3cc11

Jan 18, 2016

24000km, or ${120}^{\circ}$, or $\frac{2 \pi}{3}$ radians

#### Explanation:

It travels 72 000 km in 24 hr.
8 hr is $\frac{1}{3}$ of 24 hrs
It travels $\frac{1}{3}$ of 72 000 km
$\frac{72000}{3} = 24000 k m$
But the question asks for the angular displacement, which is the displacement around the circle as an angle.
In this case it is $\frac{1}{3}$ of the circle, so ${120}^{\circ}$, or $\frac{2 \pi}{3}$ radians.