Răspuns:
a) V = L x l x h = 10cm × 5cm × 3cm = 150 cm³
b) ρ = m/V => m = ρ×V = 2.7g/cm³×150cm³ = 405 grame
405 g = 0.405 kg
G = m×g = 0.405kg×10N/kg = 4,05 N
c) Fe = Δl×k
Fe = G } => G = Δl×k => Δl = G/k
Δl = 4,05N/75N/m
= 0,054m
= 5,4 cm
= 54 mm
d) vezi atasament
