an athlete completes one of a circular track of radius r in 40 sec...what will be his displacement at the end of 2min 20sec????
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time taken to complete 1 revolution =40s
total time=2min 20sec=140secs
no. of revolutions=140/40=3.5
in 3 full rounds displacement =0
but for the remaining path left the athlete can travel along the diameter of the circle as displacement is the shortest path taken(2r)
thus displacement =diameter of circle
total time=2min 20sec=140secs
no. of revolutions=140/40=3.5
in 3 full rounds displacement =0
but for the remaining path left the athlete can travel along the diameter of the circle as displacement is the shortest path taken(2r)
thus displacement =diameter of circle
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