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RAM SAI CHARAN Grade: 12
        A wheel is initially at rest is subjected to an angular acceleration and it completes 10 rotations in time 't', then the time taken by it to complete next 10 rotations 
7 years ago

Answers : (1)

Askiitians Expert Soumyajit IIT-Kharagpur
28 Points
										

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 Experts
Soumyajit Das IIT Kharagpur

7 years ago
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