QUESTION IMAGE
Question
a rifle is fired and recoils when the bullet leaves the gun. this is an example of newtons third law. the acceleration of the bullet is the same as that of the rifle greater than that of the rifle smaller than that of the rifle
Step1: Aplicar la tercera ley de Newton
Según la tercera ley de Newton, la fuerza que ejerce el rifle sobre la bala ($F_{rifle - bala}$) es igual en magnitud y opuesta en dirección a la fuerza que ejerce la bala sobre el rifle ($F_{bala - rifle}$), es decir $F_{rifle - bala}=-F_{bala - rifle}$. Pero por la segunda ley de Newton $F = ma$.
Step2: Comparar masas y aceleraciones
La masa de la bala ($m_{bala}$) es mucho menor que la masa del rifle ($m_{rifle}$), $m_{bala}\ll m_{rifle}$. Si $F_{rifle - bala}=m_{bala}a_{bala}$ y $F_{bala - rifle}=m_{rifle}a_{rifle}$, y $|F_{rifle - bala}| = |F_{bala - rifle}|$, entonces $m_{bala}a_{bala}=m_{rifle}a_{rifle}$. Despejando $a_{bala}=\frac{m_{rifle}}{m_{bala}}a_{rifle}$. Como $\frac{m_{rifle}}{m_{bala}}> 1$, entonces $a_{bala}>a_{rifle}$.
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greater than that of the rifle