The frame shown in the figure is acted upon by wind load pressure of 1.44 kPa. These frames are spaced 4.5 m. apart normal to the paper. Consider Joint D as pin. Determine the horizontal and vertical components of the reaction at the pin connections A, B and D. of the supporting gable arch

Q: Determine the reactions at supports A, B and C 10KN 6kN Hinge D 3kN 2kN.m 2 m 4 m 2 m 2 m 3 m 2m

A: Using equilibrium equations

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A: Step 1: Step 2: Step 3: Step 4:

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Q: Find each Reaction. Show a correct FBD.

A:

Q: EXAMPLE: Determine the bar force in each member of the truss shown. 20 kN 15 kN 3.50m 3m 3m 10 kN

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A:

Q: Determine the reactions and the force in each member of the trusses shown using methods of…

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Q: 120 KN 140 KN B 2.5m с * 240 KN D 2.5m E 240KN F 2.5m 240 KN * 14 G I 2.5m 3m

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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.