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Thread: Mechanics Question

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    Mechanics Question


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    Rambling Spirit
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    Re: Mechanics Question

    Quote Originally Posted by 1729 View Post


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    Re: Mechanics Question

    Quote Originally Posted by InteGrand View Post


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    Do you use Newton's Second Law tangentially to show

    With

    Wouldn't it then be and how come instead of

    Thanks in advance

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    Re: Mechanics Question

    Quote Originally Posted by 1729 View Post
    Do you use Newton's Second Law tangentially to show

    With

    Wouldn't it then be and how come instead of

    Thanks in advance

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    Re: Mechanics Question

    Quote Originally Posted by 1729 View Post
    how come instead of

    Thanks in advance

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    Re: Mechanics Question

    Quote Originally Posted by InteGrand View Post
    Why do we only consider half of the entire arc? Is it because the net force would then be 0?

    Also what is the physical significance of integrating from
    Last edited by 1729; 17 Apr 2018 at 1:30 AM.

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    Re: Mechanics Question

    Quote Originally Posted by 1729 View Post
    Why do we only consider half of the entire arc? Is it because the net force would then be 0?

    Also what is the physical significance of integrating from





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    Re: Mechanics Question

    Quote Originally Posted by InteGrand View Post




    Thank you

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    Re: Mechanics Question

    Another mechanics question (sry trying to self-learn)

    I let x = 0 be the wharf and t = 0 be at 1:10 am which would mean the endpoints of the tidal motion are x = -1 and x = 0.4. Since we are told it is SHM, we can deduce

    Can we immediately deduce b = -0.3 since it is the centre of motion and a = 0.7? And if t is in hours, the period would be 12 hours and 25 minutes or T = 149/12 which would make n = 24pi/149.

    And using and dx/dt = 0 when t = 0 I got alpha = 0.

    Meaning I got which is clearly wrong since at t = 0, x = 0.4 and not x = -1. What have I done wrong?

    Thanks in advance

    Screen Shot 2018-04-17 at 2.30.37 am.png
    Last edited by 1729; 17 Apr 2018 at 3:43 AM.

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    Re: Mechanics Question

    Quote Originally Posted by 1729 View Post
    Another mechanics question (sry trying to self-learn)

    I let x = 0 be the wharf and t = 0 be at 1:10 am which would mean the endpoints of the tidal motion are x = -1 and x = 0.4. Since we are told it is SHM, we can deduce

    Can we immediately deduce b = -0.3 since it is the centre of motion and a = 0.7? And if t is in hours, the period would be 12 hours and 25 minutes or T = 149/12 which would make n = 24pi/149.

    And using and dx/dt = 0 when t = 0 I got alpha = 0.

    Meaning I got which is clearly wrong since at t = 0, x = 0.4 and not x = -1. What have I done wrong?

    Thanks in advance

    Screen Shot 2018-04-17 at 2.30.37 am.png


    Quote Originally Posted by 1729 View Post
    And using and dx/dt = 0 when t = 0 I got alpha = 0.




    Last edited by InteGrand; 18 Apr 2018 at 8:20 PM.
    1729 likes this.

  11. #11
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    Re: Mechanics Question

    Quote Originally Posted by InteGrand View Post








    Thank you

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