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March 29, 2017

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The plastic in a DVD disk will begin to deform at rotations faster than 10,000 revolutions per minute.

How many radians per second is that?

If the disk has a radius of 0.06 m, what is the centripetal acceleration at the edge?

  • college physics - ,

    To convert rpm to rad/s, multiply by
    (2 pi rad/rev)*(1 min/60 s)
    The Greek symbol omega (usually typed as w here) is usually used for rotation rates in radians per second.

    Centripetal acceleration is R*w^2, where R is the radius.

    You can do the numbers, I'm sure.

  • college physics - ,

    got it. thanks

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