Question

O macara ridicata uniform la inaltime de 10 m, un corp cu masa de 200kg in 2 min. Calculati lucrul mecanic motor si puterea mwcanica a motorului macaralei . Se considera g= 10N/kg

Answer 1

d=14
t=20s
m=350kg
Rez.
L=F*d
F=G=mg=350kg*10N/kg=3500
L=3500N*14m=49000J
P=$\frac{l}{t}$
P=$\frac{49000J}{20s}$=2450W
R: L=49000J;P=2450W