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)?

physics - bobpursley, Thursday, October 25, 2007 at 6:54am
I have no idea what the picture is, but you can use conservation of energy (as you have done) to solve it. The speed at C is zero, so you know the energy was lost to friction. Again, conservation of energy.

Answer this Question

Related Questions

physics - A 0.395-kg blue bead slides on a frictionless, curved wire, starting ...
PHY 101 - A 0.425-kg blue bead slides on a frictionless, curved wire, starting...
physics - a green bead of mass 70 g slides along a straight wire. The length of...
physics - a green bead of mass 70 g slides along a straight wire. The length of...
physics - As shown in the figure below, a green bead of mass 50 g slides along a...
DUMANGEZE - A 0.04KG BEAD SLIDES ON A CURVED STARTING FROM REST AT POINT A.THE ...
physics - A red bead releasd from rest at height H slides down a wire without ...
General Physics - The 5 kg block in the figure slides down a frictionless curved...
Physics - A wire is frictionless between points A and B and rough between B and ...
Physics - An aluminum wire is hung between two towers and has a length of 175 m...

For Further Reading

First Name:
School Subject:
Answer: