Physics, 22.04.2020 16:00 alexandraschwartz21
Uma prancha homogênea de 10 m de comprimento e peso 600 N está apoiada por dois rolos conforme a figura. O menino se desloca lentamente de tal forma que o atrito do rolo, com a prancha e o solo, seja capaz de impedir o deslocamento horizontal da prancha. A que distância máxima x da extremidade direita da prancha deve ser posicionado o rolo B para que o menino de peso 400 N, partindo de A, possa caminhar até a extremidade direita sem a mesma girar?
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