Question

VA ROG AJUTATI MA E URGENT PS:nu prea inteleg la fizica si as aprecia foarte mult orice forma de ajutor

Answer 1

Răspuns:

2) prima are acceleratia mai mare

3) 54km/h = 54000m/3600s = 15 m/s

a = (v₂ - v₁)t = (15m/s - 12m/s)/0,5s = (3m/s)/0,5s = 6 m/s²

4) 200km/h = 200000m/3600s = 55,(5) m/s

a = (v₂ - v₁)/t = (55,(5)m/s - 0m/s)/5s = 55,(5)m/s)/5s = 11,(1) m/s²