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Thread: How to represent as DE ?

  1. #1
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    How to represent as DE ?

    I have a homework but despite all my efforts, I could not. I need help about it. I do not expect exact solution but if you help me I would like to solve and get verification from you.

    About the question : I have to get differential equation from this :

    quest.jpg

    And values for question right here :

    M1 = 500KG
    M2 = 450KG

    m1(t) = 150KG
    m2(t) = 120KG

    k1 = 20 , b1 = 20

    k2 = 10 , b2 = 15


    Please help, how to obtain a differential equation from this question ?

  2. #2
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    Quote Originally Posted by aaeerr View Post
    I have a homework but despite all my efforts, I could not. I need help about it. I do not expect exact solution but if you help me I would like to solve and get verification from you.

    About the question : I have to get differential equation from this :

    quest.jpg

    And values for question right here :

    M1 = 500KG
    M2 = 450KG

    m1(t) = 150KG
    m2(t) = 120KG

    k1 = 20 , b1 = 20

    k2 = 10 , b2 = 15


    Please help, how to obtain a differential equation from this question ?
    What do you about the PHYSICS of the tip pont control? Are you supposed to use work-energy method to establish the equation of motion? You must have a similar problem as an example problem in your text-book (or in your class-notes).
    “... mathematics is only the art of saying the same thing in different words” - B. Russell

  3. #3
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    Quote Originally Posted by Subhotosh Khan View Post
    What do you about the PHYSICS of the tip pont control? Are you supposed to use work-energy method to establish the equation of motion? You must have a similar problem as an example problem in your text-book (or in your class-notes).

    It is first example unfortunately. It looks like spring piston and mass, but still I could not get differantial equation. We should think as follows :

    queststp.jpg

  4. #4
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    Quote Originally Posted by aaeerr View Post
    It is first example unfortunately. It looks like spring piston and mass, but still I could not get differantial equation. We should think as follows :

    queststp.jpg
    Do you know the ODE for one mass (one df) system?
    “... mathematics is only the art of saying the same thing in different words” - B. Russell

  5. #5
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    Quote Originally Posted by Subhotosh Khan View Post
    Do you know the ODE for one mass (one df) system?
    [hr]
    Yes I learned myself but the above model is wrong that I have drawn. Unfortunately I learned it is wrong, my next opinion is related to Second Law of Newton.

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