The terminal velocity of a penny in Earth's atmosphere is about 25 miles per hour (or 40 kilometers per hour). This is fast enough to hurt if you were to be hit by one but in contrast to urban legends it would not be lethal. The relatively low mass of a penny relative to its cross section (due to its small size) reduces its terminal velocity; a larger object would be more lethal since it would not only have a larger mass (and thus more kinetic energy at the same velocity) but also a higher terminal velocity.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence