Respuesta :

ANSWER: 27 seconds

Given:
a = 0.50 m/s^2
vi = 0 m/s
vf = 13.5 m/s
t = ?

Kinematics formula: vf = vi + at
13.5 = 0 + 0.50t
13.5 = 0.50t
t = 27 s