CE 122 – Engineering Mechanics: Vector operations. Wedges. Frictional forces on screws and flat belts. Rolling resistance. Virtual work for a system of connected rigid bodies,Equilibrium of a particle, Free body diagram, Moment of forces about a point and about an axis, Equivalent systems, Joints/Equilibrium of a rigid body in two and three dimensions, Joints/ Equilibrium of a rigid body in two and three dimensions, Trusses, Frames and machines, Dry friction, Moment of inertia.