Sobre un bloque de 40 N se aplica una fuerza cuya magnitud es de 15 N formando un ángulo de 25° con la horizontal, como se ve en la figura. Si el bloque adquiere una aceleración cuya magnitud es de 1.5r m/s2. Calcular el coeficiente de fricción dinámico.

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).