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October 20, 2014

Homework Help: physics

Posted by Anonymous on Thursday, October 25, 2007 at 12:16am.

A .400 kg bead slides on a curved wire, starting from rest at point A. If the wire in problem 61 is frictionless between points A and B (down 5m) and rough between B and C (up 2m), and if the bead starts from rest at A, (a) find the speed at B. (b) If the bead comes to rest at C, find the loss in mechanical energy as it goes from B to C.

(a) (1/2)(0)^2 +(9.8m/s^2)(5m) = (1/2) vf^2 + (9.8m/s^2)(0m) = 9.90m/s
(b)?

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