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CBSE Class 9 Answered

 A  particle  moves in a circle with O as centre and AO=OB=5CM, as radius . It starts from A. Calculate :  (1) the distance covered ; and the displacement , when it reaches B
Asked by wanidrjaveed | 10 Mar, 2017, 12:17: PM
answered-by-expert Expert Answer
Distance is the total length covered between A and B that is length of minor arc AB subtended by central angle straight theta =radius cross times straight theta=5straight theta.
Displacement is the change in the final position from the original position, 
this in our case it would be length of the chord AB = 2ropen parentheses Sinθ over 2 close parentheses=10open parentheses Sinθ over 2 close parentheses
Answered by Abhijeet Mishra | 10 Mar, 2017, 07:08: PM

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