A sign has a mass of 1050.0 kg, a height h = 1 m, and a width W = 4.0 m. It is held by a light rod of length 5.0 m that is perpendicular to a rough wall. A guy wire at 23.0° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the wall is 1 m.
Suppose we rely upon friction between the wall and the rod to hold up the sign (there is no hinge attaching the rod to the wall). What is the smallest value of the coefficient of friction μ such that the sign will remain in place?

Question

A sign has a mass of 1050.0 kg, a height h = 1 m, and a width W = 4.0 m. It is held by a light rod of length 5.0 m that is perpendicular to a rough wall. A guy wire at 23.0° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the wall is 1 m.
Suppose we rely upon friction between the wall and the rod to hold up the sign (there is no hinge attaching the rod to the wall). What is the smallest value of the coefficient of friction μ such that the sign will remain in place?

anonymous · Answer

Where are you stuck at?

anonymous · Answer

smallest value is ofc 1

anonymous · Answer

1=100% fricton and then it has enough power to counter the force of movement

anonymous · Answer

What force(s) does the wire (tension) exert?

anonymous · Answer

Hint:  the cable (tension) provides the force which holds the rod against the wall. Balance the force of friction resulting from the force from the cable on the rod with the downward force of the weight of the sign.