Scientists took more than 1500yrs to distill the principles governing the motion of objects.
Pause the video and refer to "Physics Matter" should you have any doubts.
At appropriate points, pause the video and enter your comments (start with your name) and use one or more of the following command words to structure your comments:
1. What do you THINK about the video content?
2. What questions or PUZZLE do you have?
3. What is it in the video that makes you want to EXPLORE?