An athlete completes half a round of a circular track of radius, $R$ . Then, the displacement and distance covered by the athlete are

2 R a n d π R

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π R a n d 2 R

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R a n d 2 π R

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2 π R a n d R

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Solution

The correct option is A $2 R a n d π R$
For completing the half round of circle, the distance covered will be half of circumference of the circle i.e., $d = π R$ .
Displacement is the shortest distance between initial and final position, so the displacement will be just the diameter of circle. $S = 2 R$

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An athlete completes half a round of a circular track of radius, R. Then, the displacement and distance covered by the athlete are

The correct option is A 2RandπRFor completing the half round of circle, the distance covered will be half of circumference of the circle i.e., d=πR.Displacement is the shortest distance between initial and final position, so the displacement will be just the diameter of circle. S=2R

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