Respuestas

2013-04-29T01:01:11+02:00

v = d/t

 

v=12m/4s=3m/s

 

a=v/t=(3m/s)/4s=0.75m/s^2

 

t=v/a= (31m/s)/(0.75m/s^2)

 

t=23.25seg

 

 

  • Usuario de Brainly
2013-04-29T01:20:55+02:00

vi = 0 m/seg

a = 3m/seg²

t = ? 

vf = 31m/seg

 

t = (vf - vi)/a

 

t = (31m/seg - 0m/seg) / (3m/seg²)

 

t = 31m/seg / 3m/seg²

 

t = 10,33 seg

 

espero que te sirva, salu2!!!!