# Answer on Mechanics | Relativity Question for Anonymous

Question #6589

If the rotational speed of a disc is doubled, what happens to the tangential speed of any point on the disc?

Expert's answer

As we know angular speed omega=V/r where V-tngential speed, r -radius of revolution

hence tangential speed V=omega*r

Now it's clear that if we double omega tangential speed will also double regardless of value of r(i.e. for any point of the disk)

hence tangential speed V=omega*r

Now it's clear that if we double omega tangential speed will also double regardless of value of r(i.e. for any point of the disk)

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