motion trajectory motion diagram operational definition translational motion particle particle model position vector, scalar quantity vector quantity displacement, zero vector, 0 r D r r r r time interval, average speed average velocity, average acceleration, position-versus-time graph pictorial representation a r v r D t representation of knowledge SI units significant figures order-of-magnitude estimate SUMMARY The goal of Chapter 1 has been to introduce the fundamental concepts of motion. General Strategy Motion Diagrams • Help visualize motion. • Provide a tool for finding acceleration vectors. c These are the average velocity and the average acceleration vectors. Problem Solving MODEL Make simplifying assumptions. VISUALIZE Use: • Pictorial representation • Graphical representation SOLVE Use a mathematical representation to find numerical answers. ASSESS Does the answer have the proper units? Does it make sense?
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