Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Maximum Oscillation Amplitude?

  1. Dec 16, 2009 #1
    An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m = 0.12 g) driven back and forth in SHM at 0.9 MHz by an electromagnetic coil.
    (a) The maximum restoring force that can be applied to the disk without breaking it is 36,000 Newtons. What is the maximum oscillation amplitude that won't rupture the disk?
    (in ┬Ám)

    (b) What is the disk's maximum speed at this amplitude?
    (in m/s)

    For position, I would guess to use x = Acos(omega*t)
    I cannot tie the proper equations together, though. Help would be appreciated. Thanks.
     
  2. jcsd
  3. Dec 16, 2009 #2

    ehild

    User Avatar
    Homework Helper

    You know mass and force. What quantity is determined by their ratio?

    You wrote correctly the time dependence of position in SHM. What about velocity and acceleration?

    ehild
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook