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helbrida
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#1
Report Thread starter 15 years ago
#1
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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elpaw
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#2
Report 15 years ago
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i assume the string is inextensible?
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Fermat
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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 ΓΈ=22Β°
=======

Edit: correction to answer - small error - sorry
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