Question

1. Un avión despega cuando su velocidad es 306 Km/h. si los alcanza en 170 s partiendo del reposo. a. Que distancia de la pista ha recorrido cuando el cronometro marca 10, 20, 30, 40, 50 y 60 segundos.

Answer 1

Velocidad de despegue = 306 Km/h

306 Km/h x (1000 m/ 1 Km)x( 1 hora/3600 seg) = 85 m/s

Velocidad final (Vf) = 85 m/s

Velocidad Inicial (Vi) = 0 m/s

t = 170 segundos

Vf = Vi + at

Vf = 85 m/s; Vi = 0 m/s; t = 170 seg

85 m/s = 0 + at

a = (85 m/s)/(170 s) = 0.5 m/s²

d = (Vi)(t) +(0.5)(a)(t²)

d = (0.5)(0.5 m/s²)(t²)

Para t = 10 seg

d = (0.5)(0.5 m/s²)(10 seg)²

d = (0.5)(0.5 m/s²)(100 seg²) = 25 m

d = 25 m

Para t = 20.

d = (0.5)(0.5 m/s²)(20 seg)²

d = (0.5)(0.5 m/s²)(400 seg²)

d = 100 m

Para t = 30 seg

d = (0.5)(0.5 m/s²)(30 seg)²

d = (0.5)(0.5 m/s²)(900 seg²)

d = 225 m

Para t = 40 seg

d = (0.5)(0.5 m/s²)(40 seg)²

d = (0.5)(0.5 m/s²)(1600 seg²)

d = 400 m

Para t = 50 seg

d = (0.5)(0.5 m/s²)(50 seg)²

d = (0.5)(0.5 m/s²)(2500 seg²)

d = 625 m

Para t = 60 seg

d = (0.5)(0.5 m/s²)(60 seg)²

d = (0.5)(0.5 m/s²)(3600 seg²)

d = 900 m