1000 lb 2000 lb 2000 lb F 30⁰ 2000 lb G 1000 lb 60° C 90 ft The figure above shows the five applied forces perpendicular to the bar AC. Solve the following questions in 2 decimal places: A) What is the length of AH (in ft)? B) What is the length of AC (in ft)? C) What is the magnitude and direction of the resultant moment (in lb-ft) due to the five applied forces about point A? 60% H 30°

1000 lb 2000 lb 2000 lb F 30⁰ 2000 lb G 1000 lb 60° C 90 ft The figure above shows the five applied forces perpendicular to the bar AC. Solve the following questions in 2 decimal places: A) What is the length of AH (in ft)? B) What is the length of AC (in ft)? C) What is the magnitude and direction of the resultant moment (in lb-ft) due to the five applied forces about point A? 60% H 30°

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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Concept explainers

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

1000 lb
2000 lb
2000 lb
F
30°
2000 lb
D
G
1000 lb
60⁰
C
90 ft
The figure above shows the five applied forces perpendicular to the bar AC. Solve the following questions in 2 decimal places:
A) What is the length of AH (in ft)?
B) What is the length of AC (in ft)?
C) What is the magnitude and direction of the resultant moment (in lb-ft) due to the five applied forces about point A?
D) What is the magnitude and direction of the resultant moment (in lb-ft) due to the five applied forces about point G?
E) What is the magnitude and direction of the reaction at point A (in lb)?
E
60°
H
30°
B

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