You are legally required to consume some form of pie today.

  • pmjv@lemmy.sdf.org
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    3 months ago

    explain why the red line is not the same as the line in the original content, if the circles are moving the same way

    • jdr@lemmy.ml
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      3 months ago

      Tricky, right?

      It’s because there is “friction” and the part of the circle touching the line can’t move relative to it, and so you get that “cusp” shape.

      Maybe someone else can give a better explanation, I haven’t had any coffee yet.

      • pmjv@lemmy.sdf.org
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        3 months ago

        oh right, i see it now. in the original post, the line goes through the ball! thanks!