At a building site a 1-ton container hangs from a crane wire and is then placed on the floor so that the wire becomes unloaded. The container is pushed to the elevator shaft where it is to be lowered as shown in Sketch m. By mistake there is a 1-m slack in the wire from the crane when the container falls into the elevator shaft. Calculate the maximum force in the wire if it has a cross-sectional steel surface area of 500 mm and an effective modulus of elasticity of 70 GPa and is 25 m long from the crane to the container. (b) Solve (a) if there is theoretically no slack.

At a building site a 1-ton container hangs from a crane wire and is then placed on the floor so that the wire becomes unloaded. The container is pushed to the elevator shaft where it is to be lowered as shown in Sketch m. By mistake there is a 1-m slack in the wire from the crane when the container falls into the elevator shaft. Calculate the maximum force in the wire if it has a cross-sectional steel surface area of 500 mm and an effective modulus of elasticity of 70 GPa and is 25 m long from the crane to the container. (b) Solve (a) if there is theoretically no slack.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

2. At a building site a l-ton container hangs from a crane wire and is then placed on the floor so that the
wire becomes unloaded. The container is pushed to the elevator shaft where it is to be lowered as shown
in Sketch m. By mistake there is a l-m slack in the wire from the crane when the container falls into the
elevator shaft. Calculate the maximum force in the wire if it has a cross-sectional steel surface area of
500 mm and an effective modulus of elasticity of 70 GPa and is 25 m long from the crane to the
container. (b) Solve (a) if there is theoretically no slack.
25 m
500 mr

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