A simple support (like a hinge) gives you two unknown reactions (horizontal and vertical force). But a fixed support gives you three unknowns: horizontal force (F_ax), vertical force (F_ay), a moment reaction (M_a) — the twisting force the wall exerts to keep the beam from tipping.

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(R_Ay = 1200 + 800 = 2000\ \textN upward) (M_A = 1200\cdot 1 + 800\cdot 2.5 = 1200 + 2000 = 3200\ \textNm CCW) (R_Ax=0)

High School Physics Curriculum Topic: Statics Problem Solving Date: [Current Date]