(8%) Problem 11: The pole in the figure is at a 90° bend in a power line and is therefore subjected to more shear force

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8 Problem 11 The Pole In The Figure Is At A 90 Bend In A Power Line And Is Therefore Subjected To More Shear Force 1 (89.52 KiB) Viewed 46 times

8 Problem 11 The Pole In The Figure Is At A 90 Bend In A Power Line And Is Therefore Subjected To More Shear Force 2 (113.95 KiB) Viewed 46 times

8 Problem 11 The Pole In The Figure Is At A 90 Bend In A Power Line And Is Therefore Subjected To More Shear Force 3 (121.51 KiB) Viewed 46 times

(8%) Problem 11: The pole in the figure is at a 90° bend in a power line and is therefore subjected to more shear force than poles in straight parts of the line. The tension in the two wires at the top of the pole is 4.5 x 104 N, and both wires are at an angle of 80° with respect to the pole. The х pole is 18 m tall, has an 19.5 cm diameter and can be considered to have half the strength of hardwood (hardwood has a Young's modulus of 1.5 1010 N/m² and a shear modulus of 1 x 1010 N/m2).

T 90° T Tow 80° 30 7

*33% Part (a) First ignore the guy wire (Tgw). Calculate the compression of the pole, in millimeters. AL Grade Summary Deductions Potential 95% 8 9 HOME TC ( ) 7 E14 1 5 6 sin() cos tan() cotan asin() acos() atan acotan sinh cosh() tanh cotanh() Degrees O Radians Submissions Attempts remaining: 2 (5% per attempt) detailed view 1 5% 2 3 + 0 IND VOL BACKSPACE TLAR Submit Hint l'eedback I give up! Feedback: 2% deduction per feedback. Hints: 0% deduction per hint. Hints remaining: 33% Part (b) Still ignoring the guy wire, Find how much it bends in mm to the right. 33% Part (c) Now find the tension in the guy wire used to keep the pole straight if it is attached to the top of the pole at an angle of 30° with the vertical in Newtons. (The guy wire must be in the opposite direction of the bend.) All content 2022 Expert TA. LLC