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    Another stupidity of mine.

    A ball is tied to one end of a string. The other end of the string is fixed. The ball is set in motion around a vertical circle without friction. At the top of the circle, the ball has a speed of v = (Rg)^(1/2). At what angle (from the horizontal line) should the string be cut so that the ball will travel through the center of the circle?

    I've solve it but I'm not sure.
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    i assume the string is inextensible?
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    (Original post by helbrida)
    Another stupidity of mine.

    A ball is tied to one end of a string. The other end of the string is fixed. The ball is set in motion around a vertical circle without friction. At the top of the circle, the ball has a speed of v = (Rg)^(1/2). At what angle (from the horizontal line) should the string be cut so that the ball will travel through the center of the circle?

    I've solve it but I'm not sure.
    I get ø=22°
    =======

    Edit: correction to answer - small error - sorry
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