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A particle covers half of the circle of radius $\mathrm{r}$. Then the displacement and distance of the particle are respectively
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The correct answer is:
$2 \mathrm{r}, \pi \mathrm{r}$
When a particle cover half of circle of radius $r$, then displacement is $A B=2 r$
Distance $=$ half of circumference of circle $=$ $\pi$
Distance $=$ half of circumference of circle $=$ $\pi$
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