Question

A particle covers half of the circle of radius, $r$. Then the displacement and distance of the particle, respectively, are

• A. $2\pi r,0$
• B. $2r,\pi r$
• C. $\frac{\pi r}{2},2r$
• D. $\pi r,r$

Answer 1

The correct option is B $2r,\pi r$

When a particle covers half of a circle of radius $r$, then displacement is $=$diameter $=2r$ and the distance $=$ half of circumference of circle $=\pi r$