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Homework Help: Town clock seconds hand speed and centripetal acceleration

  1. Sep 17, 2010 #1
    1. (a)The speed of the tip of the minute hand on a
    town clock is 0.00136 m/s.
    What is the speed of the tip of the second
    hand of the same length?
    Answer in units of m/s.

    (b)What is the centripetal acceleration of the tip
    of the second hand?
    Answer in units of m/s2.




    2. Relevant equations
    atotal = sq rt (a2 radial + a2 tangential) where aradial = −v2/r and atangential = d|v|/dt


    3. The attempt at a solution
    I have no idea how to start this... I just think I need to use those equations
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 17, 2010 #2

    collinsmark

    User Avatar
    Homework Helper
    Gold Member

    Your relevant equations only deal with acceleration. But anyway, as a place to start, what is the length of the minute hand?
     
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