5.) Determine the maximum bending moment that can occur at a point 8 m from the left support of a simply supported beam of 24 m span when the following series of wheel-loads traverses the beam from the left: load (kN) spacing (m) 5 10 15 10 2 2 2 Note: Take the 10 KN at the right as the front-wheel load. Determine also the absolute maximum bending moment that can occur in the beam.

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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.