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UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
ESCUELA NACIONAL PREPARATORIA No 5
“JOSÉ VASCONCELOS”
Página
1
FÍSICA III RAPIDEZ MEDIA
1] Un auto realiza un viaje en dos etapas, tarda 0.85 horas en recorrer la primera
etapa, en la etapa segunda recorre 45 kilómetros en media hora. Si la rapidez
media de todo el viaje es de 100 km/h ¿qué distancia recorre en la primera
etapa?
2] La rapidez media de un automóvil en un viaje es de 80km/h, en el primer tramo
del viaje recorre 360km con una rapidez media de 90km/h, en el segundo tramo
del viaje recorre 690km ¿Cuánto tiempo tarda el automóvil en recorrer el
segundo tramo del viaje?
3] Un coche recorre tres cuartas partes de una carretera con una rapidez promedio
de 40
𝑘𝑚
ℎ
, y la otra cuarta parte con una rapidez promedio de 50
𝑘𝑚
ℎ
. ¿Cuál es la
rapidez promedio del viaje redondo?
4] A las 8:00am un automóvil está pasando por el km 50 de una carretera recta
moviéndose con una rapidez constante de 80
𝑘𝑚
ℎ
en el sentido en que crece el
kilometraje marcado en la carretera. A las 9:15 am, otro auto va pasando por el
km 695 de la misma carretera moviéndose con una rapidez constante de 100
𝑘𝑚
ℎ
en sentido contrario al del primer auto. ¿a qué hora del día y en qué kilómetro se
cruzan los automóviles?
5] Dos autos que se mueven en la misma dirección con rapideces constantes están
separados 150km. El automóvil más adelantado lleva una rapidez de 65
𝑘𝑚
ℎ
mientras que el que va detrás se mueve a 90
𝑘𝑚
ℎ
. ¿En cuanto tiempo la
separación entre ambos automóviles será de 40km?

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Rapidez media

  • 1. UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO ESCUELA NACIONAL PREPARATORIA No 5 “JOSÉ VASCONCELOS” Página 1 FÍSICA III RAPIDEZ MEDIA 1] Un auto realiza un viaje en dos etapas, tarda 0.85 horas en recorrer la primera etapa, en la etapa segunda recorre 45 kilómetros en media hora. Si la rapidez media de todo el viaje es de 100 km/h ¿qué distancia recorre en la primera etapa? 2] La rapidez media de un automóvil en un viaje es de 80km/h, en el primer tramo del viaje recorre 360km con una rapidez media de 90km/h, en el segundo tramo del viaje recorre 690km ¿Cuánto tiempo tarda el automóvil en recorrer el segundo tramo del viaje? 3] Un coche recorre tres cuartas partes de una carretera con una rapidez promedio de 40 𝑘𝑚 ℎ , y la otra cuarta parte con una rapidez promedio de 50 𝑘𝑚 ℎ . ¿Cuál es la rapidez promedio del viaje redondo? 4] A las 8:00am un automóvil está pasando por el km 50 de una carretera recta moviéndose con una rapidez constante de 80 𝑘𝑚 ℎ en el sentido en que crece el kilometraje marcado en la carretera. A las 9:15 am, otro auto va pasando por el km 695 de la misma carretera moviéndose con una rapidez constante de 100 𝑘𝑚 ℎ en sentido contrario al del primer auto. ¿a qué hora del día y en qué kilómetro se cruzan los automóviles? 5] Dos autos que se mueven en la misma dirección con rapideces constantes están separados 150km. El automóvil más adelantado lleva una rapidez de 65 𝑘𝑚 ℎ mientras que el que va detrás se mueve a 90 𝑘𝑚 ℎ . ¿En cuanto tiempo la separación entre ambos automóviles será de 40km?