Question

Ofer 10 puncte si coroana la primul raspuns.
F1=6N
Dl1=3cm
F2=8N
Dl2=?
K=?


F1=?
Dl1=8cm
F2=10N
Dl2=2cm

F1=8N
Dl1=10cm
F2=?
Dl2=5cm

F1=15N
Dl1=?
F2=10N
Dl2=4cm

Answer 1

1.
 6N............3cm
8N................X
X= 8*3/6=4cm
Fe =K*Δl Fe forta elastica
F₁ =K₁*Δ l₁
K₁= F₁/Δ l₁
K₁ = 6/3= 2 N/m
K₂=10/5=2 N/m

ex.2)
10N.............2cm
X(F₁).............8cm
F₁= 10*8/2=40N
 
ex.3).
8N..................10cm
F2....................5cm
F₂=8*10/5=16N

ex.4).
10N...............4cm
15N..................d1
d1= 15*4/10= 6cm