Q3. The rigid pole and cross-arm assembly as shown in figure. Determine the vector expression for the moment of the 1.2-kN tension (a) about point O and (b) about the pole z-axis. B 1.5 m /C 1.5 m T = 1.2 kN 3 m 2m 1.5 m

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A: Due tot the complexity of the question i am providing handwritten solution

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Q: A plane truss is loaded as shown in the figure. If the force acting on the member AC and BC are 50kN…

A: The given data is as follows: Force on member AC=50 kNForce on member BC=70 kN

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.