Mohon bantuannya ya buat no. 24

W / W' = (1/2 kΔx²) / (1/2 kΔx'²)
W' = W (Δx' / Δx)²
     = W [6 cm / (2 cm)]² = 9 W

W' = 1/2 FΔx'
F = 2W' / Δx'
    = 2(9W) / (0,06 m) = 300 W