The pole in the figure is at a 90° bend in a power line and is therefore T. ubjected to more shear force than poles in straight parts of the line. The tension in the two wires at he top of the pole is 3.9 × 104 N, and both wires are at an angle of 80° with respect to the pole. The ole is 13 m tall, has an 18.5 cm diameter and can be considered to have half the strength of ardwood (hardwood has a Young's modulus of 1.5 × 1010 N/m² and a shear modulus of 1 × 1010 N/m²). 90° 80° 30 Part (a) First ignore the guy wire (Tgw). Calculate the compression of the pole, in millimeters. Part (b) Still ignoring the guy wire, Find how much it bends in mm to the right. 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 ver

The pole in the figure is at a 90° bend in a power line and is therefore T. ubjected to more shear force than poles in straight parts of the line. The tension in the two wires at he top of the pole is 3.9 × 104 N, and both wires are at an angle of 80° with respect to the pole. The ole is 13 m tall, has an 18.5 cm diameter and can be considered to have half the strength of ardwood (hardwood has a Young's modulus of 1.5 × 1010 N/m² and a shear modulus of 1 × 1010 N/m²). 90° 80° 30 Part (a) First ignore the guy wire (Tgw). Calculate the compression of the pole, in millimeters. Part (b) Still ignoring the guy wire, Find how much it bends in mm to the right. 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 ver

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 38P: A uniform horizontal strut weighs 400.0 N. One end of the strut is attached to a hinged support the...

See similar textbooks

Similar questions

Review the relationship between stress and strain. Can you find any similarities between the two quantities?
A wooden door 2.1 m high and 0.90 m wide is hung by two hinges 1.8 m apart. The lower hinge is 15 cm above the bottom of the door. The center of mass of the door is at its geometric center, and the weight of the door is 260 N, which is supported equally by both hinges. Find the horizontal force exerted by each hinge on the door.
A uniform horizontal strut weighs 400.0 N. One end of the strut is attached to a hinged support the wall and the other end of the strut is attached to a sign that weighs 200.0 N The strut is also supported by a cable attached between the end of the strut and the wall. Assuming that the entire weight of the sign is attached at the very end of the s find the tension in the cable and the force at the hinge of the strut.
Check Your Understanding A 2.0-m-long wire stretches 1.0 mm when subjected to a load. What is the tensile strain in the wire?
What type of stress are you applying when you press on the ends of a wooden rod? When you pull on its ends?
A thin wire strung between two nails in the wall is used to support a large picture. Is the wire likely to snap if it is strung tightly or if it is strung so that it sags considerably?
In the What If? section of Example 12.2, let d represent the distance in meters between the person and the hinge at the left end of the beam. (a) Show that the cable tension is given by T = 93.9d + 125, with T in newtons. (b) Show that the direction angle of the hinge force is described by tan=(323d+41)tan53.0 (c) Show that the magnitude of the hinge force is given by R=8.82103d29.65104d+4.96105 (d) Describe how the changes in T, , and R as d increases differ from one another.
An aluminium (=2.7g/cm3) wire is suspended from the ceiling and hangs vertically. How long must the wire be before the stress at its upper end reaches the proportionality limit, which is 8.0107N/m2 ?
length. Two wires A and B are of the same Their diameters are in the ratio 1: 2 and the Young's modulii are in ratio 2:1. If they are pulled by the same force, then elongations will be in ratio (a) (c) 4:1 1:2 (b) (d) 1:4 2:1
The Tethered Satellite in shown has a mass of 525 kg and is at the end of a 20.0 km long, 2.50 mm diameter cable with the tensile strength of steel. (a) How much does the cable stretch if a 100 N force is exerted to pull the satellite in? (Assume the satellite and shuttle are at the same altitudeabove the Earth.) (b) What is the effective force constant of the cable? (c) How much energy is stored in it when stretched by the 100 N force?
Two wires A and B are of the same length. Their diameters are in the ratio 1:2 and the Young's modulii are in ratio 2 : 1. If they are pulled by the same force, then elongations will be in ratio
An electric post is supported by a guy wire which exerts a pull of 100N on the top of the post. If the angle between the guy wire and the ground is 60 degrees, determine the vertical component of the force supporting the pole