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Ksju [112]
3 years ago
6

Une voiture de 2 200 kg se déplaçant à 25 m/s [S] s'arrête

Physics
1 answer:
Maksim231197 [3]3 years ago
5 0

Answer:

Parte A

La aceleración que detiene el automóvil, a es -2,5 m / s²

Parte B

La fuerza neta requerida para producir la aceleración es de 5500 N

Explanation:

Part A

Los detalles del movimiento del automóvil son

La masa del coche = 2.200 kg

La velocidad inicial con la que se mueve el automóvil, v₁ = 25 m / s

El tiempo (cambio) que tarda el automóvil en detenerse, Δt = 10 s

La velocidad final del automóvil después de detenerse, v₂ = 0 m / s

Aceleracion, \ a = \dfrac{Cambiar \ in \ velocidad}{Cambiar \ en \ tiempo} = \dfrac{\Delta v}{\Delta t}

Por lo tanto, tenemos;

a =  \dfrac{\Delta v}{\Delta t} = \dfrac{v_2 - v_1}{\Delta t} =\dfrac{0 \ m/s - 25 \  m/s }{10 \ s} = -2.5 \ m/s^2

The acceleration that stops the car, a = -2.5 m/s²

Parte B

Fuerza, F = La masa m, de un cuerpo en movimiento o en reposo × La aceleración del cuerpo, a

F = m · a

∴ La fuerza neta, 'F', requerida para producir la aceleración, 'a', en el carro de masa 'm' de 2200 kg se da de la siguiente manera

F = 2200 kg × 2,5 m / s² = 5500 N

La fuerza neta requerida para producir la aceleración, F = 5500 N

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