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12. Una lancha de motor parte del reposo y alcanza una velocidad de \( 60 \mathrm{~km} / \mathrm{h} \) al este en 22 segundos. Calcular: Su aceleración en \( \mathrm{m} / \mathrm{s}^{2} \) Su desplazamiento en m .

Ask by Watson Valdez. in Mexico
Mar 14,2025

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La aceleración es de aproximadamente \(0.758\, \mathrm{m/s^2}\) y el desplazamiento es de aproximadamente \(183.44\, \mathrm{m}\).

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Para calcular la aceleración, podemos usar la fórmula: \[ a = \frac{\Delta v}{\Delta t} \] Donde \(\Delta v\) es el cambio de velocidad y \(\Delta t\) es el tiempo. Primero, convertimos \(60 \mathrm{~km/h}\) a \(\mathrm{m/s}\): \[ 60 \mathrm{~km/h} = \frac{60 \times 1000}{3600} = 16.67 \mathrm{~m/s} \] Ahora, usando: \[ a = \frac{16.67 \mathrm{~m/s} - 0 \mathrm{~m/s}}{22 \mathrm{s}} = \frac{16.67 \mathrm{~m/s}}{22 \mathrm{s}} \approx 0.76 \mathrm{~m/s^2} \] Para el desplazamiento, utilizamos la fórmula del movimiento rectilíneo uniformemente acelerado: \[ d = v_0 t + \frac{1}{2} a t^2 \] Asumiendo que parte del reposo (\(v_0 = 0\)): \[ d = 0 + \frac{1}{2} (0.76 \mathrm{~m/s^2}) (22 \mathrm{s})^2 \approx 184.32 \, \text{m} \] Así que la aceleración es aproximadamente \(0.76 \mathrm{~m/s^2}\) y el desplazamiento es cerca de \(184.32 \, \text{m}\).

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