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Natalierg05
30.10.2020 •
Chemistry
2. Una polea de 0.8 ft de diámetro gira con una velocidad angular de 5 rad/s. Calce
la a) su velocidad lineal o tangencial, b) su frecuencia.
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Ответ:
a) v = 0.61 m/s
b) f = 0.80 s⁻¹
Explanation:
a) La velocidad tangencial de la polea es:
Fórmula:
En donde:
r: es el radio = d/2
d: es el diámetro = 0.8 ft
ω: es la velocidad angular = 5 rad/s
Podemos hallar la velocidad tangencial sustituyendo los valores de ω y d en la ecuación (1) y haciendo la conversión de feet a metro:
Entonces, la velocidad lineal es 0.61 m/s.
b) La frecuencia de la polea esta dada por:
Fórmula:
Resolviendo la ecuación anterior para f tenemos:
Sustituyendo los valores de ω en la ecuación (2) nos queda:
Por lo tanto, la frecuencia de la polea es 0.80 s⁻¹.
Espero que te sea de utilidad!
Ответ:
Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.
Explanation: