an athlete is running on a circular track of radius 20 m.Find out the distance and displacement after completion of one and the half rounds of tracks.

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Solution

Dear Student,
$1) a f t e r c o m p l i t i o n o f 1 r o u n d d i s \tan c e = 2 π r = 2 \times 3.14 \times 20 = 125.6 m a n d s i p l a c e m e n t = 0 (a s i t r e a c h i n g a t t h e s a m e p o i n t) 2) a f t e r c o m p l i t i o n o f h a l f r o u n d d i s \tan c e = π r = 3.14 \times 20 = 62.28 m a n d s i p l a c e m e n t = 2 r = 2 \times 20 = 40 m$
Regard

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an athlete is running on a circular track of radius 20 m.Find out the distance and displacement after completion of one and the half rounds of tracks.

Dear Student, 1) after complition of 1 round distance =2πr=2×3.14×20=125.6mand siplacement=0 (as it reaching at the same point)2) after complition of half round distance =πr=3.14×20=62.28mand siplacement=2r =2×20=40m Regard