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Three girls skating on a circular ice gr...

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. What is the magnitude of the displacement vector for each ? which girl's displacement is equal to the actual length of path skate ?
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Text Solution

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Displacement for each girl = `vec(PQ)`.
`therefore` Magnitude of the displacement for each girl.
=PQ = diameter of circular ice ground.
=2xx200 = 400m`
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