Question

An object is moving in a circle of radius r. Calculate the ratio of distance and displacement (a) when it completes half the circle (b) when it completes one full circle

Answer 1

Given raddi =r

Complete half of revolution

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Distance =2×pi×r/2

=pi×r

Displacement =2r

Ratio =pi/2

Complete one revolution

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Distance =2×pi×r

Displacement =0

Ratio =0