aside: Pole in a barn 'paradox' in special relativity This is a classic braintwister, up there with the twins. A pole is 20m
![Undergrad Physics: Special Relativity] Pole-in-the-Barn Paradox: how can I calculate the time interval between the front door and back door being closed/opened from the runner's perspective? : r/HomeworkHelp Undergrad Physics: Special Relativity] Pole-in-the-Barn Paradox: how can I calculate the time interval between the front door and back door being closed/opened from the runner's perspective? : r/HomeworkHelp](https://preview.redd.it/undergrad-physics-special-relativity-pole-in-the-barn-v0-s33g06xj02x91.jpg?auto=webp&s=38c5ffa0af678307632bafa0052d39f6b6c62d76)
Undergrad Physics: Special Relativity] Pole-in-the-Barn Paradox: how can I calculate the time interval between the front door and back door being closed/opened from the runner's perspective? : r/HomeworkHelp
![special relativity - Variation of ladder/barn paradox: can observer on ladder see that barn was too small? - Physics Stack Exchange special relativity - Variation of ladder/barn paradox: can observer on ladder see that barn was too small? - Physics Stack Exchange](https://i.stack.imgur.com/wkPHv.gif)