Basic concepts of mechanics: space, time, force, mass. basic models: particle, system of particles, rigid and deformable body. Axiom of inertia – statics of a particle. Basic principles (axioms) of the rigid body statics. System of concurrent forces. Moment of a force about a point, moment of a force about an axis, Varignon's theorem. A couple, reduction of a force to a point. Arbitrary system of forces. Coplanar forces - equilibrium. Equilibrium of the system of rigid bodies. Friction. Analysis of the arbitrary system of forces, static invariants, central axis, Varignon's theorem. Parallel forces. Center of gravity, centroid. Analysis of structures. Trusses - method of joints, method of sections. Beams and frames - axial force, shearing force and bending moment. Cables and catenaries. Analytical statics. Virtual displacement, virtual work of forces and couples. Principle of virtual work. Stability of equilibrium.