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Dear Ram Sai Charan,
Ans:- Let the angular acceleration is a
θ=1/2 a t²
or 10×2∏=1/2 a t²
a=40∏/t².......................(1)
let the total time taken by it to rotate 20 rotations=T Hence from 1 we get,
T²=80∏/a
=2t²
T=√2 t
Hence if we calculate the time from the instant it finished 10 rotations is =(√2 - 1)t
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Regards,
Askiitians ExpertsSoumyajit Das IIT Kharagpur
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