- #1
Pnume
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There's something I struggle to understand.
In the picture I attached to this post , the first drawing is a system with the sum of momentum = 0 (equilibrium).
In the second drawing I increase temporarily the force on point A in order to get and angle of 20° compare to the last position and maintain the angle stable for a moment.
Why when I stop to force the angle of 20° does the system come back to the previous position (after some oscillation) since from my understading the sum of momentum is also at equilibrium?http://img199.imageshack.us/img199/7277/momentumg.th.jpg [Broken]
For information I'm not a student
Thanks for your help
In the picture I attached to this post , the first drawing is a system with the sum of momentum = 0 (equilibrium).
In the second drawing I increase temporarily the force on point A in order to get and angle of 20° compare to the last position and maintain the angle stable for a moment.
Why when I stop to force the angle of 20° does the system come back to the previous position (after some oscillation) since from my understading the sum of momentum is also at equilibrium?http://img199.imageshack.us/img199/7277/momentumg.th.jpg [Broken]
For information I'm not a student
Thanks for your help
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