question_answer 8)

Three girls skating on a 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 Fig. 4.101. What is the magnitude of the displacement vector for each?             For which girl is this equal to the actual length of path skated ?      

Answer:

Displacement of each girl Magnitude of displacement vector for each girl  radius . For girl B, the magnitude of displacement vector = actual length of path.