Răspuns :

Răspuns:

delta v = 80 km/h = 80 * 1000/3600 m/s  =  200/9 m/s

a= delta v / delta t

=> delta t = delta v / a => delta t = (200/9) / 1,5 = 200/9 * 10/15 = 14,81 s

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