Question

Ajutooor. REPEDE. Dau coroana

Answer 1

Răspuns:

V = (10cm)³ = 1000 cm³

d = m/V => m = d×V = 3g/cm³×1000cm³ = 3000 g = 3 kg

Δl = 11 cm - 10 cm = 1 cm = 0,01 m

a)

Fe = G = k×Δl

m×g = k×Δl

Δl = m×g/Δl = 3kg×10N/kg)/(0,01m) = 3000 N/m

b)

G = m×g = 3kg×10N/kg = 30 N

c)

Fe = G = 30 N