# Doubt From Centripetal Acceleration

hint find radius of curvature formula then balance forces..

@Sneha_2021 I have problem with sign only. One solving I am getting both sign. please provide a proper reason to neglate negative sign

- you can only get in roc calculation as you have to find vmax will be always positive nthing sophisticated..

- for more instance draw graph you will see velocity always along postive x direction at highest point of curve its irodov problem...

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@Ankith_2020 move with -ve velocity of same magnitude will be equivalent to move on path -a sin( x/ alpha) so there shouldn’t be any problem i think .

From where did you get this question ?

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