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Math Help - Very tough mechanics problem?

  1. #1
    Super Member fardeen_gen's Avatar
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    Very tough mechanics problem?

    What is the maximum velocity of slider B if the system is released from rest from x = y. Motion is in the vertical plane. Assume friction is negligible. The sliders(A and B) have equal masses.

    Answer: 0.31 m/s

    I am unable to do this(i tried the concepts of mechanics which i know of like energy conservation etc. but to no avail). Can anyone help?
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  2. #2
    MHF Contributor arbolis's Avatar
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    I'd start by drawing a free body diagram on body B.
    By intuition the angle that the spring forms with the vertical (45 I'd say) will not change with time. You know that the acceleration occurs only vertically.
    Maybe that can help you.
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  3. #3
    Super Member fardeen_gen's Avatar
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    The two sliders are attached by a rod(not a spring) of constant length 0.9 m.
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  4. #4
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    Quote Originally Posted by fardeen_gen View Post
    The two sliders are attached by a rod(not a spring) of constant length 0.9 m.
    Then why would they move at all? Are you assuming that B is in a vertical channel and falls under gravity? You didn't say that before. If that is the case then I think I would look at "conservation of energy". A moves horizontally so its potential energy would not change. B will lose potential energy so the total kinetic energy of A and B must equal the lost potential energy of B.
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