Two-dimensional rigid-body equilibrium2D
Simply supported beam
Construct planar free-body diagrams and solve support reactions, stability, and three-force-body conditions.
Open the complete lessonEngineering simulation studio
Purpose-built 2D FBDSimply supported beam reactions
Solve pin and roller reactions for a point load plus a full-span UDL.
correct supportsreaction arrowsdimensions
Engineering model scope
Category
Two-dimensional rigid-body equilibrium
Idealization
Ideal supports supply only their permitted reactions; deformation is neglected.
Acceptance check
Check ΣFx = 0, ΣFy = 0, ΣM = 0, plus contact, uplift, sliding, or tipping limits where relevant.