Respuestas

2013-08-21T22:13:34+02:00
Partimos de:

a = Vf - Vo / t
x = Vo t + 1/2 a t^2

Si Vo = 0 m/s

a = Vf / t
x = 1/2 a t^2

100 = 1/2 . a . 5^2 , de donde a = 8 m/s^2
Vf = 8 . 5 = 40 m/seg =144 km/h