Hanging Sign
Posted on Monday, March 15th, 2010 at 6:48 amHanging Sign
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Rotational Statics and Dynamics: Hanging Sign?
A sign has a mass of 1080 kg, a height h = 1 m, and a width W = 3 m. It is held by a light rod of length 4 m that is attached to the wall by a frictionless hinge. A guy wire at 23° 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.
a) What is the tension in the wire?
b) What is the magnitude of the normal force exerted by the rod on the hinge?
c) Now suppose the hinge is removed and we rely upon friction between the wall and the rod to hold the sign. What is the smallest value of the coefficient of friction µ such that the sign will remain in place?
d) A high wind blows the center of the sign away, leaving only a frame which weighs 98.6 kg. For the same conditions as in part (c), what is the smallest allowed value of µ?
THANK YOU SO MUCH! THIS HAS BEEN CAUSING ME A MASSIVE HEADACHE =D
blinov or Tolich?
I'd like to know the solution to this as well!
