- #1
arestes
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Homework Statement
A (rectangular homogeneous) picture is hung with a nail on the wall from a twine. Neglecting the friction of the twine with the nail and that of the wall with the picture,
a.-Could there exist equilibrium in other positions than the one where the picture is hanging horizontally? If so, are those other positions in stable equilibrium?
b.-Is the picture in stable equilibrium when hanging horizontally?
Thanks for any help
I´m attaching a drawing
Homework Equations
Torques about a point.
The Attempt at a Solution
I chose the nail as reference. Tensions are going at an angle but their line of action intersect at the nail so only the weight could make any torque about that point. Horizontally there{s no torque at all about that point. If I slightly tilt the picture then a torque appears about that point trying to restore it to its original horizontal position. sO I think QUESTION b is: YES.
Part a. I think it´s more tricky... I{m not sure about the geometry. I´m trying to see if having different lengths for the two sides of the twine make it impossible to vanish the torque generated by the weight.
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