Respuesta :
Even surfaces that seem smooth have different bumps that you could see with a microscope, so friction occurs even with smooth-looking objects.
basically, EVERY action has an equal and opposite reaction ↑↓
also,(as far as i know) no object is completely smooth, even though there are some that come pretty close, like mirrors
also,(as far as i know) no object is completely smooth, even though there are some that come pretty close, like mirrors
