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-Hallar la aceleracion que adquiere un bloque de 30 kg por la accion de una fuerza de 150 N cuando se aplica con un angulo de 30 grados se sabe que el coeficiente de friccion entre el bloque y el suelo es de 0,32.
-Hallar el coeficiente de friccion sabiendo que para para empujar una caja de 20 kg horizontalmente y con una rapidez constante se requiere de una fuerza tambien horizontal de 90 N.
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