A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity

A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity at the highest point of the circle will be

(a) √2Rg
(b) √3Rg
(c) √Rg
(d) 2Rg

√Rg

Frictional force = Centripetal force mg = mv² / R ⇒ v² = mgR / m ⇒ v² = Rg Therefore, minimum velocity v = √Rg

RA2001

admin: