Chapter 3: Two Dimensional Motion and Vectors (Now the fun really starts) Opening Question I want to go to the library. How do I get there? Things I need to know: How far away is it? In what direction(s) do I need to go? One dimensional motion vs two dimensional motion One dimensional motion: Limited to moving in one dimension (i.e. back and forth or up and down) Two dimensional motion: Able to move in two dimensions (i.e. forward then left then back) Scalars and Vectors Scalar: A physical quantity that has magnitude but no direction Examples: Speed, Distance, Weight, Volume Vector: A physical quantity that has both magnitude and direction Examples: Velocity, Displacement, Acceleration Vectors are represented by symbols Book uses boldface type to indicate vectors