Question

VA ROG AM NEVOIE DE REZOLVAREA PROBLEMELOR
DAU COROANA!​

Answer 1

Explicație:

1. v=108km/h= 108000m/3600s=30m/s

∆t=2minute=120 secunde

a=∆v/∆t= 30/120=0.25 m/s^2

2. a=1.5 m/s^2

v=72 km/h = 72000 m/3600s→v=20 m/s

a=∆V/∆t→1.5=20/∆t→ ∆t=20/1.5= 13,33

Succes!