Question

Calculati energia urmatoarelor corpuri:
• o minge de masa m=500g aflata la h=7 m
• un resort de K=400N/m comprimat cu delta l=5 cm​

Answer 1

Răspuns:

m=500g=0.5kg
h=7m

Epg(energie potentiala a greutati)=m×g×h

Epg= 0.5kg×10N/kg×7m=35J

K=400N/m

Δl=5cm=0.05m
Epe(energie potentiala a fortei elastice)= K×Δl²/2

Epe=400N/m×0.05m/2 =10J

Explicație:

nush formule