4.1 The Position, Velocity, and Acceleration Vectors 4.1 Displacement vector 4.2 Average velocity 4.3 Instantaneous velocity 4.4 Average acceleration 4.5 Instantaneous acceleration

4.2 Two-Dimensional Motion with Constant Acceleration Velocity vector as a function of time 4.9 Position vector as a function of time

4.3 Projectile Motion v xi = v i cos  i and v yi = v i sin  i

4.4 The Particle in Uniform Circular Motion 4.14 Centripetal acceleration 4.15 Period of circular motion

4.5 Tangential and Radial Acceleration 4.16 Total acceleration 4.17 Tangential acceleration 4.18 Radial acceleration

4.6 Relative Velocity and Relative Acceleration