Question

exercitile marcate dau coroana

Answer 1

2.132
Δl=10cm
k=150N/m
F=Δl·k
F=10cm·150N/m
F=0,1m·150N/m
F=15N(forta deformatoare)
2.137
k=50N/m
p=2,5g/cm³
V=4cm³
m=p·V
m=2,5g/cm³·4cm³
m=10g
F=m·g
F=10g·10N/kg
F=0,1kg·10N/kg
F=1N
Δl=F/k
Δl=1N/50N/m
Δl=1/50 m=1/50 ·100cm=2cm(alungirea resortului);
2.138
k=500N/m
m=2,5kg
F=m·g
F=2,5kg·10N/kg
F=25N(valoarea fortei deformatoare);
Δl=F/K
Δl=25N/500N/m
Δl=1/20 m=1/20 ·100cm=5cm(alungirea resortului);