What you’ll learn3 learning objectivesChoose one objective for a focused lesson, or study the complete topic.4.2.1The principle of moments• state and apply the principle of momentsSyllabus objective4.2.2That, when there is no resultant force and no resultant torque, a system is• understand that, when there is no resultant force and no resultant torque, a system is in equilibriumSyllabus objective4.2.3A vector triangle to represent coplanar forces in equilibrium• use a vector triangle to represent coplanar forces in equilibriumSyllabus objective