P=8,82 kw--->P= 8820W
m=4,5T--->m= 4500kg
h=8m
t=?
P=[tex] \frac{L}{t} [/tex]
h(inaltimea), in cazul nostru este distanta.
L=F*h
G=m*g =>G= 4500kg*9,8N/kg= 44.100N
L=44.100N*8 m=352.800J
P= [tex] \frac{L}{t} \ \textless \ =\ \textgreater \ t= \frac{L}{P} \ \textless \ =\ \textgreater \ t= \frac{352.800J}{8820W} =40[/tex]
t=40s