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    susus's Avatar
    susus Posts: 138, Reputation: 2
    Junior Member
     
    #1

    Dec 10, 2010, 02:45 PM
    Mass inside a tube 2
    so again, I'm updating my question:

    The figure shows a mass M inside a tube bent in a circle of radius R=1.50 m. M can slide with negligible friction inside the tube. The tube rotates about a vertical axis passing through the center. The mass is in equilibrium at θ =43.5 degrees. Calculate the number of revolution the hoop makes in 10.0 s.
    so I got 4.78

    Now my problem is with this :
    Calculate the linear speed of the mass at that equilibrium location.
    (in m/s)


    here is it's picture
    http://i49.tinypic.com/2cr845u.jpg



    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Dec 10, 2010, 03:14 PM

    susus - it's better to ask a follow-up question in the same thread as before, rather than starting a new thread. From that previous thread (here: https://www.askmehelpdesk.com/physic...be-533066.html ), the linear speed of the mass is the tube rotates is:



    and for this problem



    You already know and , so what's the problem?
    susus's Avatar
    susus Posts: 138, Reputation: 2
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    #3

    Dec 11, 2010, 07:44 AM
    Comment on ebaines's post
    I just did not know how to update the question
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Dec 12, 2010, 10:35 AM

    Next time, just reply in the 'answer box'. The 'reply' button has a limited number of characters, so, it might be better in all cases to use the 'answer box'.
    susus's Avatar
    susus Posts: 138, Reputation: 2
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    #5

    Dec 12, 2010, 01:42 PM
    Comment on ebaines's post
    OK I did it , thanks

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