Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

enter image description here

Which point on or inside or outside the frame move in a circular trajectory?

share|cite|improve this question
up vote 1 down vote accepted

Think about what happens when a corner hits the circle. The rectangle immediately begins moving in a straight line ... until the next corner hits the circle. No straight lines in a circle, there is no purely circular motion for the rectangle or any point in it.

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.