Grade 9Mechanics

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

akash rathi

7 Years agoGrade 9

2 Answers

Arun

7 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

7 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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View all Questions

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

akash rathi

2 Answers

Arun

Khimraj

(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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If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

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