Question

Four girls skating on circular ice ground of radius $200\,m$ start from a point $P$ on the edge of the ground and reach a point $Q$ diametrically opposite to $P$ following different paths as shown in figure. For which girl displacement is equal to the actual length of path?

• A. $A$
• B. $B$
• C. $C$
• D. $D$

Answer 1

Answer: (C)

$C$

Answer 2

Displacement of each girl $=\overline{PQ}$ Magnitude of displacement for each girl $=\left|\overline{PQ}\right|$ $=2\times200\,m$ $=400\,m$ For girl $C$, displacement = actual length of path.