A coin placed on a rotating table just slips

Asked by admin @ 17/08/2021 in Physics viewed by 258 People

A coin placed on a rotating turn table just slips if it is at a distance of 40 cm from the centre if the angular velocity of the turntable is doubled, it will just slip at a distance of

Answered by admin @ 17/08/2021

(w= angular velocity)
F= m w^2 r
F slip= m w^2 40. --> eqn(1)
F slip= m (2w)^2 R2
F slip=4m w^2 R2 --> eqn(2)
solving 1 and 2
m w^2 40 = 4 m w^2 R2
so R2 = 10 cm

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