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has1993
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Homework Statement
A pole is suspended horizontally between a wall and an attached string.(See the attachment). An object(W) is hanging from the pole at a distance of x from the wall. Find the value of x that preserves the equilibrium.
1) the angle between the pole and the string(q) = 10°
2) the mass of the object(W) = mass of the pole
3) static friction coefficient between the wall and the pole = 0.3
4) the maximum angle at which the pole could be kept in horizontal (without the object) = 16.7°
Homework Equations
torque = distance × force
The Attempt at a Solution
I've tried to build a linear system of 3 equations for the pole without the object by taking the torques at the wall-end, string-end and half-way to the center of gravity of the pole (at l/4) so:
W*l/2 = T * l * Sin(16.7) -------> 1
W*l/2 = l * T*0.3*Cos(16.7) --------->2
l*T*0.3*Cos(16.7)/4 + W*l/4 = 3*l*T*Sin(16.7)/4 --------->3
l = length of the pole
By solving the system i tried to find the values of l, and W so i can use them to solve the one with the object. I don't know even if this is correct but i can't find a way to solve it if it's correct. So any help would be really appreciated. (And sorry for my coarse English.