https://tubedu.org/videos/watch/264eaf92-a42e-48ee-8084-a205868de9ec We need a coordinate system to specify the positions and motion of objects. This video explains what a coordinate system is and how to set up one for one dimensional and two dimensional cases. Relevant chapter: Motion in a straight line The music at the beginning is from https://www.lineshjose.com. Lesson download: https://utube-resources-63b002.gitlab.io/physics11/coords_system/ If you want, you can try out the demonstrations shown in the video here: 3D coordinate system: https://utube-resources-63b002.gitlab.io/physics11/3d_coord_system Bouncing ball: https://utube-resources-63b002.gitlab.io/physics11/bouncing_ball Motion in a plane: https://utube-resources-63b002.gitlab.io/physics11/plane_motion Fri, 10 Jul 2026 15:44:20 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tubedu.org https://tubedu.org/lazy-static/avatars/7df48ebf-b4f1-469c-84f7-728abbebec35.png https://tubedu.org/videos/watch/264eaf92-a42e-48ee-8084-a205868de9ec All rights reserved, unless otherwise specified in the terms specified at https://tubedu.org/about and potential licenses granted by each content's rightholder.