The 6 m long beam above is subjected to a point force of 15 kN at an angle of θ = 60°, a clockwise couple moment of 20 kN·m, and a constant distributed load of 10 kN/m as shown. It is pinned at A and has a roller at B.  Neglect the weight of the beam.  A. Determine the support reactions at pin A and roller E. B. The shear force between A and B is: C. The shear force between B and C is: D. The shear force between C and D is: E. The shear force between D and E is: F. The moment between A and B is: E. The moment between B and C is: F. The moment between C and D is: G. The moment between D and E is: H. Sketch shear force chart. I. Sketch moment diagram.

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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.