Question

ρ=250 kg/m cub
V=100 dm cub
g=10 N/kg
K=10 N/kg
m=?
Δl=?
G=?

Answer 1

ρ = m/V => m = ρ×V

100dm³ = 0,1m³

m = 250kg/m³×0,1m³ = 25 kg

G = m×g = 25kg×10N/kg = 250 N

Fe = Δl×k

Fe = G

G =  Δl×k => Δl = Fe/k

Δl = 250N/10N/m = 25 m