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Homework Help: Angular Acceleration of a hammer

  1. Nov 2, 2008 #1
    Having a bit of trouble with this question right here. If anyone could give some guidance it would be appreciated.

    A hammer is being accelerated at 15 rad/s^2. Given a radius of rotation of 1.7mm what are the magnitudes of the radial and tangential components of acceleration when the tangential hammer speed is 25 m/s?
  2. jcsd
  3. Nov 3, 2008 #2


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    Welcome to PF!

    Hi matyash! Welcome to PF! :smile:

    Show us what you've tried, and where you're stuck, and then we'll know how to help. :smile:
  4. Nov 3, 2008 #3


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    [tex]\alpha = \frac{15 rad}{s^_{2}}[/tex]

    [tex]r = 0.0017 m[/tex]

    [tex]a_{c}= r \alpha[/tex]

    [tex]a_{t} = \frac{\Delta V}{t}[/tex]

    [tex]\vec{a} = \sqrt{a_{c}^{2} + a_{t}^{2}}[/tex]

    set the problem up like that. All of the variables are pretty straight forward. And the equations are as shown.

    a_c is the centripetal accel. while alpha is the radial accel
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