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 skate?

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (C)

C

Answer 2

Displacement of each girl $= \overset{\rightarrow}{PQ}$

Magnitude of displacement for each girl

$= \left| \overset{\rightarrow}{PQ} \right| = 2 \times 200m = 4000m$

For girl C, displacement = actual length of path