The pole in the figureis at a 90.0∘ bend in a power line and is therefore subjected to more shear force than poles in straight parts of the line. The tension in each line is 3.80×104 N, at the angles shown. The pole is 15.0 m tall, has an 15.0 cm diameter, and can be considered to have half the stiffness of hardwood. (a) Calculate the compression of the pole (in mm). answer mm (b) Find how much it bends ( in mm) answer mm and in what direction does it bend ? (A)To the right (B)To the left (c) Find the tension in a guy wire used to keep the pole straight if it is attached to the top of the pole at an angle of 30.0∘ with the vertical. (Clearly, the guy wire must be in the opposite direction of the bend.)? answer N
The pole in the figureis at a 90.0∘ bend in a power line and is therefore subjected to more shear force than poles in straight parts of the line.
The tension in each line is 3.80×104 N, at the angles shown. The pole is 15.0 m tall, has an 15.0 cm diameter, and can be considered to have half the stiffness of hardwood.
(a) Calculate the compression of the pole (in mm).
answer mm
(b) Find how much it bends ( in mm)
answer mm
and in what direction does it bend ?
(A)To the right
(B)To the left
(c) Find the tension in a guy wire used to keep the pole straight if it is attached to the top of the pole at an angle of 30.0∘ with the vertical. (Clearly, the guy wire must be in the opposite direction of the bend.)?
answer N
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