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ajprincess
 4 years ago
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
ajprincess
 4 years ago
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

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ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1Here dw:1352046269529:dw

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1so whats the question, that is correct \(a=\ddot x\) where differentiation is w.r.t time.

ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1oops sorry forgot to post the question

ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1Determine the operating speed of the fan.

ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1352046585292:dw Am I right?

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1if u take x as sinusoidal, then x_max = A=0.2mm are you suppose to take it as sinusoidal ?

ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1i am nt sure. Bt in the answr given they use \(x=Acos(\omega t)\) i dnt get why they use it.

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1i 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
 4 years ago
Best ResponseYou've already chosen the best response.1and this speed you will get it in rad/sec ofcourse by taking sqrt of w^2

ajprincess
 4 years ago
Best ResponseYou've already chosen the best response.1where do we use \(x=Asin\omega t\) and \(x=Acos\omega t\)? Are they equal? I am nt getting this.

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1they 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
 4 years ago
Best ResponseYou've already chosen the best response.1so what equation should be used here @hartnn?

hartnn
 4 years ago
Best ResponseYou've already chosen the best response.1not 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
 4 years ago
Best ResponseYou've already chosen the best response.1Ha k. Thanxxxxx a lot for helping me:)
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