Physics Grade 9 Unit 3 3.3 Average Velocity and Instantaneous Velocity

Physics grade 9 Unit 3 Motion in a Straight Line 3.3 Average Velocity and Instantaneous Velocity Where an object started and where it stopped does not completely describe the motion of the object. Velocity is a physical quantity that describes how fast a body moves as well as the direction in which it moves. Hence, velocity is a vector quantity. Its symbol is v (v with an arrow on the head). The SI unit of velocity is meter per second (m/s). Other units of velocity include kilometer per hour (km/h) and miles per hour (mi/h).