In this series of Physicswala episodes, Alak Pandey introduces the concepts of displacement, distance, average speed, average velocity, instantaneous velocity, acceleration, and equations of motion for uniform acceleration. He explains how to calculate displacement and distance when a particle moves along the circumference of a circle, and provides a shortcut formula for calculating displacement and distance. He also explains the special case of a person travelling in a straight line with two different velocities, and how to calculate the average velocity. He then explains how to calculate the instantaneous velocity, acceleration, and retardation, and how to integrate velocity with respect to time to find the displacement. Finally, he emphasizes the importance of taking out the velocity at time 4 and time 5 multiple times.