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test respondido de preguntas sobre dinámica del trabajo (fisica),
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test respondido de preguntas sobre dinámica del trabajo (fisica), 100% correcto.
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DINÁMICA DE LA PARTÍCULA, TRABAJO y MOVIMIENTOHARMÓNICO SIMPLE: PREGUNTAS TEST
→Cuando sobre un cuerpo actúa solo una fuerza perpendicular a la
trayectoria:
a) El vector de momento lineal no varía
b) El vector aceleración es constante
c) El cuerpo describe una trayectoria recta.
d) El módulo del momento lineal no varía
→ El trabajo realizado por fuerzas conservativas:
a) Es nulo
b)Solo depende de la posición inicial y final
c) Es una trayectoria cerrada es siempre positivo
d) Es una trayectoria cerrada es siempre negativo
→ El peso de un cuerpo
a) No realiza trabajo
b) Realiza siempre un trabajo positivo
c) Realiza siempre un trabajo nulo si el cuerpo vuelve al estado
inicial
d) Realiza siempre un trabajo positivo
→ Cuando un cuerpo se desliza con rozamiento sobre otro:
a) |Fr| > μe * N
a. (Siendo Fr vector, representado con una flecha)
b) |Fr| > μd * N
b. (Siendo Fr vector, representado con una flecha)
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