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Help with problem about beads and a hoop

by newcool
Tags: beads, hoop
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newcool
#1
Jan19-05, 06:48 PM
P: 42
Thanks for the help
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learningphysics
#2
Jan19-05, 07:53 PM
HW Helper
P: 4,124
Quote Quote by newcool
Consider this problem:

http://www.physics.harvard.edu/probweek/prob35.pdf

The solution is here:

http://www.physics.harvard.edu/probweek/sol35.pdf


Why is N and [tex]mg *\cos\theta [/tex]both positive? I thought N point away from the hoop
No N is inward. The beads try to go outward, but the loop pulls them inward.
newcool
#3
Jan19-05, 09:56 PM
P: 42
Thanks, I got the first part, anyone have any idea bout the second?

learningphysics
#4
Jan19-05, 10:22 PM
HW Helper
P: 4,124
Help with problem about beads and a hoop

Quote Quote by newcool
Thanks, I got the first part, anyone have any idea bout the second?
Yes, the second part looks right to me.


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