A G-rated rope's minimum breaking strength is 40 kN. Which of the following is a correct equivalent in pounds-force?

• A. 2250 lb
• B. 9000 lb
• C. 4500 lb
• D. 6750 lb

Answer: (B)

The main idea is converting forces from kilonewtons to pounds‑force. A kilonewton is 1000 newtons, and 1 newton is about 0.224809 pounds‑force, so you multiply: 40 kN × 1000 × 0.224809 ≈ 8,992 lbf, which rounds to about 9,000 lbf. So the correct equivalent is around 9,000 pounds‑force.

The other options correspond to roughly 10 kN, 20 kN, or 30 kN (about 2,250 lb_f, 4,500 lb_f, and 6,750 lb_f respectively), which do not match 40 kN.