Mecánica 5to
Quiz
•
Physics
•
11th Grade
•
Practice Problem
•
Medium
Pastro nomía
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76 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
La dimension de la fuerza es
Answer explanation
Fuerza F = m·a => [F]=M·(L·T^-2)=M·L·T^-2. © C. Pastrana
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Un bloque sube con velocidad decreciente por rozamiento: que sucede con K?
Answer explanation
Rozamiento disipa energia; si no hay aporte externo suficiente, la cinetica baja. © C. Pastrana
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Que es una magnitud fisica?
Answer explanation
Una magnitud fisica es toda propiedad que puede medirse y expresarse con un numero y una unidad (p.ej., longitud, tiempo). © C. Pastrana
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
En un sistema masa-resorte sin rozamiento
Answer explanation
Se intercambian K y U, con E_total constante. © C. Pastrana
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Energia potencial elastica ideal
Answer explanation
Para resorte ideal: U(x)=1/2 k x^2 (x desde el punto de equilibrio). © C. Pastrana
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
En un colchon elastico ideal sin rozamiento
Answer explanation
Conversion entre U_elastica y K con E_total constante. © C. Pastrana
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Al comprimir un resorte para lanzar un bloque hacia arriba sin rozamiento
Answer explanation
Cadena: U_elastica -> K -> U_g al subir. © C. Pastrana
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