This worksheet is part of a video lesson based on Topic 2.2 of the IB Physics syllabus.Topics explored include naming, drawing and identifying action-reaction pairs, a single interaction produces a pair for forces, force pairs occur on different objects so do not cancel, applications to tug-of-war, spring scales, water jets, pulling a rickshaw. The free video lesson available at https://www.youtube.com/watch?v=LOmkgL8sG6g. The worksheet contains 3 pages of questions and 3 pages of solutions.Ple