A cantilever beam of span 12 m carries a triangular load that varies linearly from zero at the free end to 360 N/m at the fixed end. In addition, a 1000-N upward vertical load acts at the free end of the beam. Determine the location of zero shear measured from the free end. (In m) Choices: 6.73 8.16 3.84 5.27 Note: please help me to understand on hiw to solve this sample question thank you and also please base your answer on the given choices

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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.