An athlete travels in a circle track of radius 14m. Find the distance and displacement when he completes: a)Full-circle b)Half circle
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Explanation:
Distance is the actual length of path covered by the object during its motion.
Displacement is the shortest path between initial and final positions of the object.
On completing a full circle initial and final points become same and hence displacement becomes zero, whereas distance covered by object is the circumference of the circular track that is
=2πr
=2π(14) = 28π m
On completing half circle the object reaches at diametrically opposite end from the point of start. Hence displacement is equal to diameter
that is = 2r = 2(14)= 28 m
while distance is half if circumference
= πr = 14π m
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