2.1 Displacement, Velocity, and Acceleration | General Physics

Chad provides an introduction to Kinematics with the topics of displacement, velocity, and acceleration. Displacement is defined as the change in position or the straight line distance between two points and the associated direction and has SI units of meters (m). Displacement is a vector quantity and is contrasted with distance which is a scalar. Velocity is defined as the displacement divided by the change in time and has SI units of meters per second (m/s). Velocity is a vector quantity, having both magnitude and direction, and is contrasted with speed which is a scalar. The concepts of average velocity and instantaneous velocity are also introduced, and it is shown that the magnitude of the instantaneous velocity is equal to the slope of a line tangent to the curve of a plot of position vs time. Acceleration is defined as the change in the velocity divided by the change in time and has SI units of meters per second squared (m/s^2). Acceleration is a vector quantity, having both magnitude and direction.

Chad also introduces motion diagrams to compare and contrast zero velocity, constant velocity, and varying velocity. He presents similar motion diagrams for acceleration to compare and contrast zero acceleration (i.e. constant velocity), uniform acceleration (i.e. constant acceleration), and varying acceleration.

00:00 Lesson Introduction
00:50 Displacement and Displacement vs Distance
03:59 Velocity and Velocity vs Speed
13:03 Acceleration
21:08 Introduction to Kinematics Calculations

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