Question

8· ㅢ1 points OSC0IPhys2016 5.3.WA,049 My Notes The pole in the figure below is at a 90° bend in a power line and is therefore subjected to more shear force than ones in straight parts of the line. The tension in each line is 3.00 x 104 N, at the angles shown. The pole is 15.0 m tall, has a 15.0 cm diameter, and can be considered to have half the strength of hardwood. Assume Young's modulus to be 7.5 x 109 N/m2 and the shear modulus is 5.0 x 109 N/m2 90 30 (a) Calculate the compression of the pole. (b) Find how much it bends and in what direction. magnitude direction (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.) Additional Materials

Answer 1

a The force Gr) ensien Paraltel to the lon langth of the Pole ? Cross sec tien aren of the fole 2 チ571 ng XTTX 0,15

b) The bendtng of the pole rs Calcuinted g S STd2 Lo SX109 Хту 0,152- sight