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FISICA SEMANA 3 – CICLO VERANO2021
1. De la figura mostrada hallar la magnitud de la aceleración en (𝑚 𝑠2
⁄ ) del bloque de masa 20
kg. Si F = 400 N y 𝑢𝑘 = 0,2. (g = 10 𝑚 𝑠2
⁄ ).
a)11,6 b)10,6 c) 9,2 d) 10,2 e)9,3
1. El sistema mostrado permanece en reposo. Si la masa de las poleas y de la barra es 1
kg y 6 kg, respectivamente, determine el módulo de la tensión en la cuerda (1). (g =
10 𝑚 𝑠2
⁄ )
2. Una viga ABC es de sección uniforme, su peso propio es de 40 N y se apoya en una
articulación (punto B). En el extremo C se halla sometida a la tensión de un cable. En el
extremo A se suspende un bloque de 50 N de peso. Considerando el sistema en equilibrio,
determinar la tensión en el cable CD. Donde AB = 2 m y BC = 4 m.
a)10N b)20N c)30N d) 40N e)60N
3. El cuerpo de 2kg se suelta en la posición mostrada. Si la rapidez máxima que adquiere es 5
𝑚 𝑠
⁄ , determine la tensión en la cuerda en dicho instante. g = 10 𝑚 𝑠2
⁄
A )20N b) 25N c) 30N d) 40 N e) 50N
4. Determinar la velocidad angular con que gira la masa “m”; sabiendo que la tensión en las
cuerdas (1) y (2) son iguales. La cuerda horizontal (2) mide 0,3. (g = 𝜋2
𝑚 𝑠2
⁄ )
A )4 ; 8 b) 3 ; 6 c) 5 ; 10 d) 7 ; 14 e) 2 ; 4
Fisica semana 3

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Fisica semana 3

  • 1. FISICA SEMANA 3 – CICLO VERANO2021
  • 2. 1. De la figura mostrada hallar la magnitud de la aceleración en (𝑚 𝑠2 ⁄ ) del bloque de masa 20 kg. Si F = 400 N y 𝑢𝑘 = 0,2. (g = 10 𝑚 𝑠2 ⁄ ).
  • 3. a)11,6 b)10,6 c) 9,2 d) 10,2 e)9,3
  • 4. 1. El sistema mostrado permanece en reposo. Si la masa de las poleas y de la barra es 1 kg y 6 kg, respectivamente, determine el módulo de la tensión en la cuerda (1). (g = 10 𝑚 𝑠2 ⁄ )
  • 5.
  • 6.
  • 7. 2. Una viga ABC es de sección uniforme, su peso propio es de 40 N y se apoya en una articulación (punto B). En el extremo C se halla sometida a la tensión de un cable. En el extremo A se suspende un bloque de 50 N de peso. Considerando el sistema en equilibrio, determinar la tensión en el cable CD. Donde AB = 2 m y BC = 4 m. a)10N b)20N c)30N d) 40N e)60N
  • 8.
  • 9. 3. El cuerpo de 2kg se suelta en la posición mostrada. Si la rapidez máxima que adquiere es 5 𝑚 𝑠 ⁄ , determine la tensión en la cuerda en dicho instante. g = 10 𝑚 𝑠2 ⁄
  • 10. A )20N b) 25N c) 30N d) 40 N e) 50N 4. Determinar la velocidad angular con que gira la masa “m”; sabiendo que la tensión en las cuerdas (1) y (2) son iguales. La cuerda horizontal (2) mide 0,3. (g = 𝜋2 𝑚 𝑠2 ⁄ ) A )4 ; 8 b) 3 ; 6 c) 5 ; 10 d) 7 ; 14 e) 2 ; 4