Răspuns:
Un mobil pornește uniform variat....
se da:. R-re:
v0=15m/s. | x=x0 +v0×t+(at^2)/2
x=10m. |. 10=0+15×t+(a×t×t)/2
v=10m/s. |. v=v0+at 10=15+at
x0=0m. |. at= -5. 10=15t+((-5)×t)/2
_________ |. 10=15t-2,5t 10=12,5t t=0,8s
t-? a=∆v/∆t. a=(10-15)/0,8= -6,25m/s^2
a? R/s: t=0,8s a=-6,25m/s^2
Așa cred
