A pallet loaded with machinery parts weighs 10,000 kg ($F_G ≈ 10,000 daN$). It is placed on certified anti-slip mats ($µ = 0.6$) on a clean wooden trailer floor without form-fit headboard contact. To secure against forward emergency braking ($c_x = 0.8$), what remaining securing force ($F_{sec}$) must be provided by lashing or blocking?

1. 2,000 daN (20% of cargo weight)
2. 8,000 daN (80% of cargo weight)
3. 6,000 daN (60% of cargo weight)
4. 0 daN (friction alone completely secures the load)