Problem 11.075- Determine the vertical deflection of point C caused by the load P Each member of the truss shown is made of steel and has a cross-sectional area of 5 in2. Using E= 29 × 106 psi, determine the vertical deflection of point C caused by the 10-kip load P. (Round the final answer to three decimal places.) 2.5 ft 6 ft B D The vertical deflection of point Cis 6 ft C P in. .

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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.