ENEM 2016 - Uma invenção que significou um grande avanço tecnológico na Antiguidade, a polia compost

(ENEM 2016) An invention that represented a great technological advance in Antiquity, the compound pulley or pulley system, is attributed to Archimedes (287 BC to 212 BC). The apparatus consists of associating a series of movable pulleys with a fixed pulley. The figure exemplifies a possible arrangement for this apparatus. It is reported that Archimedes demonstrated to King Hiero another arrangement of this apparatus, moving alone, on the sand of the beach, a ship full of passengers and cargo, something that would be impossible without the participation of many men. Assume that the mass of the ship was 3,000 kg, that the coefficient of static friction between the ship and the sand was 0.8, and that Archimedes pulled the ship with a force F, parallel to the direction of movement and with a magnitude equal to 400 N. Consider the ropes and pulleys to be ideal, the acceleration due to gravity equal to 10 m/s², and that the surface of the beach is perfectly horizontal. The minimum number of movable pulleys used by Archimedes in this situation was: A) 3 B) 6 C) 7 D) 8 E) 10 ================== Did you like the video? Like, subscribe and share. If you want to learn Physics with me from ZERO to ENEM, access the website ✅ https://go.fisiquei.com.br/campaign/f... and learn about my course. Follow me on social media for more Physics content: 👉  / thalesquirino   Share this video: 👉   • ENEM 2016 - Uma invenção que significou um...   Check out the complete playlist of ENEM 2016 solutions: 👉   • ENEM 2016 - A magnetohipertermia é um proc...   Professor Thales Quirino Medeiros ================== #enem #physics #lesson #solution #tip #question #exercise #correction #answerkey #approval #physics #physiquei #videolesson #enem2016 #pulley #pulleys #movablepulley #force #archimedes #hiero #ship #fixedpulley