Physics, 03.09.2021 18:30 abbygailgo674
51. Tres trabajadores levantan un piano de 3.50 kN con rapidez constante hasta un departamento a 25.0 m arriba de la calle utilizando un sistema de polea sujeto al techo del edificio. Cada trabajador puede suminis- trar 165 W de potencia y el sistema de polea es 75% efi- ciente (de manera que 25% de la energÃa mecánica se pierde debido a la fricción en la polea). Ignorando la masa de la polea, encuentre el tiempo requerido para subir el piano desde la calle al departamento.​
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51. Tres trabajadores levantan un piano de 3.50 kN con rapidez constante hasta un departamento a 25....
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