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Solve 1 st one plz

Solve 1 st one plz

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Solve 1 st one plz

153 N.mm, 0.65 X mm) (wuN 3.7 A weight of 800 N falls 30 mm on to a collar fixed to a steel bar of1.2-m length. The steel bar is of 24 mm diameter for half of its length and 12 mm for the rest half. Determine the maximum stress and the extension in the bar. E, - 205 GPa. 3.8 A lift is operated by two ropes each 20 m long and consisting of 30 wires of 1.5 mm diameter. The weight of the cage is 1 kN and the rope weighs 3.6 N/m length. Determine the maximum load that the lift can carry if it drops through 120 mm during operations. E (rope) 78 GPa and allowable stress- 125 MPa. (347.7 MPa; 1.272 mm) (1.188 kN) 3.9 A vertical tie rod consists of a 3-m long steel rod and of 24-mm diameter encased throughout in a brass tube of 24-mm intemal diameter and 36-mm external diameter. The rod is rigidly fixed at the top end. The composite tie rod is suddenly loaded by a weight of 13.5 kN falling freely through 6 mm before being stopped by the tie. Determine the maximum stresses in steel and the brass. E, -205 GPa and E, -98 GPa. (143.8 MPa: 68.76 MPa)
Transcribed Image Text:153 N.mm, 0.65 X mm) (wuN 3.7 A weight of 800 N falls 30 mm on to a collar fixed to a steel bar of1.2-m length. The steel bar is of 24 mm diameter for half of its length and 12 mm for the rest half. Determine the maximum stress and the extension in the bar. E, - 205 GPa. 3.8 A lift is operated by two ropes each 20 m long and consisting of 30 wires of 1.5 mm diameter. The weight of the cage is 1 kN and the rope weighs 3.6 N/m length. Determine the maximum load that the lift can carry if it drops through 120 mm during operations. E (rope) 78 GPa and allowable stress- 125 MPa. (347.7 MPa; 1.272 mm) (1.188 kN) 3.9 A vertical tie rod consists of a 3-m long steel rod and of 24-mm diameter encased throughout in a brass tube of 24-mm intemal diameter and 36-mm external diameter. The rod is rigidly fixed at the top end. The composite tie rod is suddenly loaded by a weight of 13.5 kN falling freely through 6 mm before being stopped by the tie. Determine the maximum stresses in steel and the brass. E, -205 GPa and E, -98 GPa. (143.8 MPa: 68.76 MPa)
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