45 KN•M В A- -1.5 m- -1.5 m- -1.5 m- Problem 6-22 Hibbeler 10 kN 10 kN 15 kN m B -2 m- 2 m 2 m For the above problems 1. Calculate support reactions 2. Establish SF and BM equations for each cross-section of the beam 3. Construct the SF and BM diagrams for each beam 4. Determine the maximum SF and maximum BM and their respective positions

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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.