A particle moves along a semi-circular path of radius R from point A to point B. What is the ratio of distance to the magnitude of displacement?

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A π:2
B 2:π
C π:1
D 1:π

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Answer: A. π:2

The total distance covered along the semi-circle is πR and the straight-line displacement from A to B is equal to the diameter (2R).
Ratio: πR: 2R

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A particle moves along a semi-circular path of radius R from point A to point B. What is the ratio of distance to the magnitude of displacement?

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