ajprincess
  • ajprincess
Please help:). the maximum amplitude and the maximum acceleration of the foundation of an industrial fan were found to be x_max=0.2mm and a_max=0.3
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
ajprincess
  • ajprincess
Here |dw:1352046269529:dw|
hartnn
  • hartnn
so whats the question, that is correct \(a=\ddot x\) where differentiation is w.r.t time.
ajprincess
  • ajprincess
oops sorry forgot to post the question

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ajprincess
  • ajprincess
Determine the operating speed of the fan.
ajprincess
  • ajprincess
|dw:1352046585292:dw| Am I right?
hartnn
  • hartnn
if u take x as sinusoidal, then x_max = A=0.2mm are you suppose to take it as sinusoidal ?
ajprincess
  • ajprincess
i am nt sure. Bt in the answr given they use \(x=Acos(\omega t)\) i dnt get why they use it.
hartnn
  • hartnn
i would write that in this manner , you are correct numerically. |x|=A , \(|\ddot x |=Aw^2\) so w^2= 0.3/0.2 as A=0.2 and \(|\ddot x |=0.3\)
hartnn
  • hartnn
and this speed you will get it in rad/sec ofcourse by taking sqrt of w^2
hartnn
  • hartnn
right ?
ajprincess
  • ajprincess
ya
ajprincess
  • ajprincess
where do we use \(x=Asin\omega t\) and \(x=Acos\omega t\)? Are they equal? I am nt getting this.
hartnn
  • hartnn
they aren't equal. just phase shift of pi/2 so either of them can be used. but in this question even it doesn't make sense to me using sinusoidal wave for fan equation, if it is given, then its ok.
ajprincess
  • ajprincess
so what equation should be used here @hartnn?
hartnn
  • hartnn
not sure, need to google it ..but since in your given answer sine waves are used, your teacher/course must expect u to take it as sinusoidal everytime....
ajprincess
  • ajprincess
Ha k. Thanxxxxx a lot for helping me:)
hartnn
  • hartnn
welcome ^_^

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