this post was submitted on 01 Dec 2023
172 points (89.4% liked)

Videos

14114 readers
3 users here now

For sharing interesting videos from around the Web!

Rules

  1. Videos only
  2. Follow the global Mastodon.World rules and the Lemmy.World TOS while posting and commenting.
  3. Link directly to the video source and not for example an embedded video in an article.
  4. Don't be a jerk
  5. No advertising
  6. Avoid clickbait titles. (Tip: Use dearrow)

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
172
The SAT Question Everyone Got Wrong (www.youtube.com)
submitted 11 months ago by [email protected] to c/[email protected]
50 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 5 points 11 months ago

The center travels 2π per rotation but need to travel 8π because the path of the center of the small circle is a circle 4r the radius of the large circle plus the radius of the small circle. It would be three if the center of the small circle traveled along the edge of the larger circle but it's edge to edge.