How an SAT question became a mathematical paradox. Head to https://brilliant.org/veritasium to start your free 30-day trial, and the first 200 people get 20%...
  • CommationCerebrole@jlai.lu
    10·
    1 year ago

    There’s one extra-rotation from an external perspective due to the revolution of one around the other. So the formula is r1 / r2 + 1.

    This extra-rotation doesn’t appear from the point of view of the circles, or if you consider the circles as two stationary gears