An object is moving in a circle of radius r. Calculate the distance and displacement when it completes half the circle, when it completes one full circle.
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Explanation:
distance when it completes half the circle = 1/2 × perimeter of the circle
= 1/2 × 2 π r
= π r
displacement when it completes half the circle = diameter of the circle
= 2 r
distance when it completes one full circle = perimeter of the circle
= 2 π r
displacement when it completes one full circle = 0 (because the initial point and the final pont are same)
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