General Studies · Engineering Mechanics

For a static simply supported beam experiencing a concentrated point load at its center, which of the following equilibrium conditions must hold true? 1. The algebraic sum of the moments due to all forces acting on the beam is zero. 2. The algebraic sum of vertical forces acting on the beam is zero. 3. The algebraic sum of horizontal forces is always negative. 4. The total acceleration experienced by the beam is non-zero.