centripetal accleration( v^2/r) or (w^2.r) so it is directly or inversely proportional to radius please answer dont ignore useful knowledge

Question

And what is answer please post thanks 

Answer 1

a_c = v²/r = (ωr)²/r = ω²r

 

Both are correct. At constant tangential speed, centripetal acceleration is inversely proportional to the radius. However, at constant angular speed, centripetal acceleration is directly proportional to the radius.