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oksano4ka [1.4K]
2 years ago
12

Considera que las masas de los cuerpos son m1 y m2, y sus velocidades antes del choque v1 y v2. Utiliza la ley de conservación d

e la cantidad de movimiento para obtener la fórmula que permite predecir la velocidad común v de los cuerpos después del choque.
Physics
1 answer:
Tems11 [23]2 years ago
7 0

Answer:

v = (m1*v1 + m2*v2)/(m1 + m2)

Explanation:

Sabemos que para un objeto de masa m y velocidad v, podemos escribir al momento lineal como:

P = m*v

Entonces, si inicialmente tenemos dos cuerpos con masas m1 y m2, con respectivas velocidades v1 y v2, el momento inicial de cada cuerpo será:

P1 = m1*v1

P2 = m2*v2

Luego estos objetos chocan y comienzan a moverse juntos (lo podemos pensar como un solo cuerpo de masa m1 + m2) con una velocidad común v, entonces el momento final será:

P' = (m1 + m2)*v

La ley de conservación de momento nos dice que el momento total de un sistema debe conservarse.  

Entonces el momento total del sistema al inicio:

P = P1 + P2 = m1*v1 + m2*v2

Debe ser igual al momento final del sistema:

P' =  (m1 + m2)*v

entonces tenemos la ecuación:

m1*v1 + m2*v2 = (m1 + m2)*v

Resolviendo esto para v, obtenemos:

v = (m1*v1 + m2*v2)/(m1 + m2)

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