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a coin kept on a rotating turntable just slips if it is placed at a distance of 4 cmfrom the centre.if the angular velocity of it is doubled,it will just slip at a distance of

a coin kept on a rotating  turntable just slips if it is placed at a distance of 4 cmfrom the centre.if the angular velocity of it is doubled,it will just slip at a distance of
 

Grade:9

2 Answers

Arun
25750 Points
4 years ago
w= angular velocity)
F= m w^2 r
F slip= m w^2 4. --> eqn(1)
F slip= m (2w)^2 R2
F slip=4m w^2 R2 --> eqn(2)
solving 1 and 2
m w^2 4 = 4 m w^2 R2
so R2 = 1 cm
Khimraj
3007 Points
4 years ago

(w= angular velocity)

F= m w^2 r

F slip= m w^2 4. --> eqn(1)

F slip= m (2w)^2 R2

F slip=4m w^2 R2 --> eqn(2)

solving 1 and 2

m w^2 4 = 4 m w^2 R2

so R2 = 1 cm

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