Doubt from mechanics


Q21 plz @arush_2019 @Shwetanshu_2018 @pratyaksh_2019

If you have any doubts pls do ask me

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Thanks a lot @Tanmay_1 @Bhuvanitha_2020

little shorter \omega=\frac{v}{R_ {\bot }}

{R_ {\bot }}=3R/5
then u will get same result as @Bhuvanitha_2020...