Consider the pin-jointed plane truss shown in the figure (not drawn to scale). Let Rp, Ro, and R denote the vertical reactions (upward positive) applied by the supports at P, Q, and R, respectively, on the truss. The correct combination of (Rp, Ro, RR) is represented by

Consider the pin-jointed plane truss shown in the figure (not drawn to scale). Let Rp, Ro, and R denote the vertical reactions (upward positive) applied by the supports at P, Q, and R, respectively, on the truss. The correct combination of (Rp, Ro, RR) is represented by

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter9: Application Of Influence Lines

Section: Chapter Questions

Problem 11P

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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

Consider the pin-jointed plane truss shown in the
figure (not drawn to scale). Let Rp, Ro, and R
denote the vertical reactions (upward positive)
applied by the supports at P, Q, and R,
respectively, on the truss. The correct combination
of (Rp, Ro, RR) is represented by
2 m
3 m
TIÌTT
7TTTT
Q
30 kN
3 m
3 m
3 m
P.

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