Question

Un tren cuya velocidad inicial es de 8 m/s acelera de manera constante a una razón de 4 m/s2 a. ¿Qué velocidad tiene el tren a los 20 segundos de viaje? b. ¿Qué distancia habrá recorrido el tren en ese tiempo?

Answer 1

a. Final velocity, V = 88 m/s

b. Distance, S = 960 meters

Step-by-step explanation:

Given the following data;

Initial velocity = 8 m/s

Acceleration = 4 m/s²

Time = 20 seconds

a. To find the final velocity, we would use the first equation of motion;

V = u + at

V = 8 + 4*20

V = 8 + 80

Final velocity, V = 88 m/s

b. To find the distance covered, we would use the second equation of motion.

S = ut + ½at²

S = 8*20 + ½*4*20²

S = 160 + 2*400

S = 160 + 800

S = 960 meters