Skip to content

Uniformly Accelerated Motion: Velocity, Displacement and Graphs

Physics Grade 9 Difficulty 2/5

Beginning of the lesson

Scientific educational illustration for the physics lesson: Uniformly Accelerated Motion: Velocity, Displacement and Graphs.
This illustration highlights the main physical model and observable relationships explored in the lesson.

Uniformly Accelerated Motion

How velocity changes at a steady rate, and how far a body travels while it does

Big Idea: In everyday life velocity rarely stays fixed — a car pulls away from a stop, a train brakes, a stone speeds up as it falls. When the velocity changes by equal amounts in equal times, the motion is called uniformly accelerated motion. One number, the acceleration, then lets us predict the velocity and the position of the body at any moment.
By the end you will be able to:
  • define acceleration and state its unit,
  • use v = v0 + at to find velocity at any time,
  • use the displacement formulas s = v0t + at2/2 and v2 = v02 + 2as,
  • read a velocity–time graph and find displacement as the area under it,
  • handle positive and negative acceleration (speeding up and slowing down).

Continue this lesson on YourAIZone

The full lesson has the complete explanation, worked examples, common mistakes, tests with instant checking and an AI tutor. Start right away as a guest, or create an account to keep your progress.

Continue as a guest Create an account Log in

In the full lesson

  • The complete explanation
  • Worked examples
  • Common mistakes and how to avoid them
  • Test questions: 15
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers