prima data aflii masa cubului:
V=10cmx10cmx10cm
V=1000cm³=0,001m³
masa cubului=2700kg/m³x0,001m³
masa cubului=2,7kg
iar dupa aceea afli greutatea corpului:
G=2,7kgx9,8N/kg
G=26,46N
iar nu in ultimul rand, afli alungirea:
26,46N=500N/mxΔL
ΔL=0,05292m=5,292cm
raspuns:5,929cm