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stepan [7]
4 years ago
9

01. Um carrinho de massa 10 kg é empurrado, horizontalmente, sobre uma superfície plana horizontal, com força constante de 20 N.

Uma força resistiva de 5 N, contra o movimento, atua sobre o carrinho. A aceleração do movimento do carrinho é igual a: * 1 ponto a) 2,5 m/s² b) 3,0 m/s² c) 2,0 m/s² d) 1,5 m/s²
Physics
1 answer:
Lostsunrise [7]4 years ago
3 0

Responder:

<h2>D. 1.5m / s² </h2>

Explicación:

Usaremos la segunda ley de movimiento de Newton para resolver esta pregunta. De acuerdo con el teorema

es la suma de las fuerzas que actúan sobre el cuerpo a lo largo de la horizontal. Las dos fuerzas son la fuerza móvil (Fm) y la fuerza de fricción (Ff).

Fm = 20 N y Ff = 5 N

\sum Fx = ma_x\\\sum Fx = Fm - Ff\\\sum Fx  = 20N - 5N\\\sum Fx  = 15N

m es la masa del cuerpo = 10 kg

El parámetro requerido es cuál es la aceleración del cuerpo a lo largo de la horizontal.

De la ecuación 1;

a_x = \sum Fx/m\\\\a_x = 15/10\\\\a_x = 1.5m/s^2

Por lo tanto, la aceleración del carro es de 1.5 m / s²

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