Dunn Lambert
05/25/2023 · High School

( 14 puntos) Una caja de 25 kg de masa se encuentra sobre una rampla la cual forma un ángulo \( \beta \) con la horizontal. El coeficiente de fricción estático entre la rampla y la caja es 0.45 ; y el coeficiente de fricción cinético es 0.25 . Si se aumenta el ángulo \( \beta \) la caja se empieza a mover deslizandose sobre la rampla con aceleración constante. Con este ángulo determine (a) la aceleración con la cual la caja desciende y (b) la rapidez con que se moverá la caja después de haberse deslizado m.

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(a) La aceleración de la caja es aproximadamente \( 2.78 \, \text{m/s}^2 \). (b) La rapidez de la caja después de deslizar \( 5 \, \text{m} \) es aproximadamente \( 5.27 \, \text{m/s} \).

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