Question

Nu inteleg la 3 ?????

Answer 1

Pai, se refera la cat de mult se fa lungii resortul(arcul)!
m=2 kg
k=400 N/m
Δl=?
G=m*g
G=10N/kg*2kg= 20N
F=G
F=k*Δl =>Δl= F /k
Δl= 20N / 400N/m = 0,05 m---->Δl= 5 cm

Answer 2

$m=2 \ kg \\ k=400 \ N/m \\ \boxed{\Delta l-?} \\ \bold{Rezolvare:} \\ \boxed{k=\frac{F_e}{\Delta l}} \Rightarrow \Delta l= \frac{F_e}{k}\\ F_e=G=m \cdot g \\ g=10 \ N/kg \\ F_e=G=2 \ kg \cdot 10 \ N/kg=20 \ N \\ \Delta l= \frac{20 \ N}{400 \ N/m} \\ \Rightarrow \boxed{\Delta l =0,05 \ m= \boxed{5 \ cm}}$