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Drill problem, linear speed of drill bit help

  1. Jan 15, 2009 #1
    Drill problem, linear speed of drill bit help plz

    1. For a 12.7mm diameter drill bit turning at a constant 1250 rev/min find a) the maximum linear speed of any part of the bit; b) the maximum radial acceleration of any part of the bit



    2. i switched the revs per minutes into 130.9 rads per sec but other than that i really have no clue what is going on or how to start so if anyone can give me hint as of where to start the actual problem would really appreciate it ty.
     
  2. jcsd
  3. Jan 15, 2009 #2

    mgb_phys

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    Re: Drill problem, linear speed of drill bit help plz

    The maximum linear speed is presumably just the speed of a point on the circumference?
    So you need the circumference of the bit and the rotation rate

    The angular velocity is just rate of change of angle (ie deg/sec or rad/sec)
    The angular acceleration is rate of change of this with time - ie the 2nd differential.
     
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