Physics
High School (11–12)
Mechanics › Motion in a Straight LineMechanics › Relative MotionMechanics › GravitationChapter 2Motion in a Straight Line
You are in a car, and another car passes you. How fast does it seem to move? Along a straight line, a few ideas are enough to answer this. In this chapter you learn relative velocity: how fast one thing moves as seen from another. Then you use it to find when two moving things meet. Python helps you check every answer.
Part of Physics · High School (11–12) (chapter 2)
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Describing Motion in One Dimension
You walk to the shop and come back to the bank. How far did you walk, and how far are you from home? Two different answers are both right. In this course we choose an axis and a starting point, we separate the path length from the displacement, we find the average and the instantaneous velocity, and we read the story of a motion in a position-time graph.
Acceleration and the Equations of Motion
A car that is stopped at a light starts and goes faster each second. A driver who sees a child brakes hard. In this course we define acceleration, we read the velocity-time graph and find the distance from its area, and we get three equations that solve most problems of motion with a constant acceleration, such as the braking distance of a car.