View Single Post
tiny-tim
#2
Feb24-12, 04:42 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,148
hi michelle! welcome to pf!
Quote Quote by michelle15g View Post
I'm not sure how to use the hoop as a constraint. I can find the difference in potential energy but I can't seem to connect it to the force - only to the momentum.
assume the hoop is fixed, and use conservation of energy to find the bead-speed at a general angle θ

(i expect you've already done that )

then find the acceleration of the beads,

then the reaction force on the beads
what do you get?