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Hitman42 [59]
3 years ago
8

.Una moto circula a 72km/h. Frena hasta detenerse y tarda 10 segundos en dicha operación.

Physics
1 answer:
adell [148]3 years ago
5 0

Answer:

I. Aceleración, a = -2 m/s²

II. Distancia, S = 100 metros

Explanation:

<u>Dados los siguientes datos;</u>

Velocidad inicial = 72 km / h

Tiempo = 10 segundos

Velocidad final = 0 m/s

<u><em>Conversión:</em></u>

72 km/h a metros por segundo = 72 * 1000/3600 = 72000/3600 = 20 m/s

I. Para encontrar la aceleración, usaríamos la primera ecuación de movimiento;

V = U + at

Dónde;

  • V es la velocidad final.
  • U es la velocidad inicial.
  • a es la aceleración.
  • t es el tiempo medido en segundos.

Sustituyendo en la fórmula, tenemos;

0 = 20 + a*10

-20 = 10a

Aceleracion = \frac{-20}{10}

<em>Aceleración, a = -2 m/s²</em>

<em>Nota: el signo negativo indica desaceleración o retraso.</em>

II. To find the acceleration, we would use the third equation of motion;

V^{2} = U^{2} + 2aS

Dónde;

  • V es la velocidad final.
  • U es la velocidad inicial.
  • a es la aceleración.
  • S es la distancia.

Sustituyendo en la fórmula, tenemos;

0^{2} = 20^{2} + 2*(-2)*S

0 = 400 - 4S

4S = 400

S = \frac {400}{4}

<em>Distancia, S = 100 metros</em>

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