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An invention that represented a great technological advance [IT WAS IN THE ENEM]

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Atalho para Passar com Jean Pegoraro

Published on Dec 31, 2024

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This question is very good for learning how to solve pulleys during the ENEM exam! (ENEM2016) An invention that represented a great technological advance in ancient times, the compound pulley. The device consists of associating a series of movable pulleys with a fixed pulley. The figure exemplifies a possible arrangement for this device. It is reported that Archimedes would have demonstrated to King Heirão another arrangement of this device, moving alone, over the sand of the beach, a ship full of passengers and cargo, something that would be impossible without the participation of many men. Suppose 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 module equal to 400 N. Consider the ideal wires and pulleys, the acceleration of gravity of 10 m/s² and that the surface of the beach is perfectly horizontal. The minimum number of movable pulleys used, in this situation, by Archimedes was a) 3 b) 6 c) 7 d) 8 e) 10 If you need to learn how to solve the biggest doubt in electricity, watch this video [HOW TO KNOW] Resistors in Series or Parallel! • [HOW TO KNOW] Resistors in Series or Parallel...

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