Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ajprincess Group Title

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

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Here |dw:1352046269529:dw|

    • 2 years ago
  2. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so whats the question, that is correct \(a=\ddot x\) where differentiation is w.r.t time.

    • 2 years ago
  3. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    oops sorry forgot to post the question

    • 2 years ago
  4. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Determine the operating speed of the fan.

    • 2 years ago
  5. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1352046585292:dw| Am I right?

    • 2 years ago
  6. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    if u take x as sinusoidal, then x_max = A=0.2mm are you suppose to take it as sinusoidal ?

    • 2 years ago
  7. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i am nt sure. Bt in the answr given they use \(x=Acos(\omega t)\) i dnt get why they use it.

    • 2 years ago
  8. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    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 \(|\ddot x |=0.3\)

    • 2 years ago
  9. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    and this speed you will get it in rad/sec ofcourse by taking sqrt of w^2

    • 2 years ago
  10. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    right ?

    • 2 years ago
  11. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ya

    • 2 years ago
  12. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    where do we use \(x=Asin\omega t\) and \(x=Acos\omega t\)? Are they equal? I am nt getting this.

    • 2 years ago
  13. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    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.

    • 2 years ago
  14. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so what equation should be used here @hartnn?

    • 2 years ago
  15. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    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....

    • 2 years ago
  16. ajprincess Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Ha k. Thanxxxxx a lot for helping me:)

    • 2 years ago
  17. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    welcome ^_^

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.