The exact rules and mechanisms behind the machines we use every day — cars, elevators, escalators, and more
You may have learned that lift comes from the different path lengths above and below a wing — the equal transit time theory. NASA says that's wrong. So what really generates lift? We verify the actual physics against the Kutta-Joukowski theorem, circulatory flow, and the relationship between Bernoulli and Newton's third law.
A "brushless motor" sticker on a fan or cordless drill always costs a bit more — but what does brushless actually mean, and why does a "DC motor" run on an AC wall outlet? We verify the real efficiency gains against the international IEC motor standard.
When ACC or regenerative braking slows your car without your foot on the pedal, do your brake lights come on? It turns out the trigger isn't the pedal at all — it's a precise deceleration threshold written into the regulations.