A girl moves on a semicircular track AB of radius 20m. What is the distance moved by the girl? What is her net displacement?
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A girl moves on a semicircular track AB of radius 20m. What is the distance moved by the girl? What is her net displacement?
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displacement =2r
the distance that she covers = 2πr/2
=[ 2×(22/7)×20]÷2
=440/7
and the displacement that she covers= 0
(because she came to its initial position)
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