Weight on Moon uses lunar gravity (1/6 Earth's)

Steps:

• Identify moon buggy mass as 210 kg (standard value for Lunar Roving Vehicle).
• Recall Moon's gravitational acceleration g_moon ≈ 1.62 m/s² (about 1/6 of Earth's 9.8 m/s²).
• Apply formula for weight: W = mass × g_moon = 210 kg × 1.62 m/s².
• Compute: 210 × 1.62 = 340.2 N, rounds to 340 N.

Why D is correct:

• Newton's law of gravitation defines weight as mg; for 210 kg on Moon, it equals 340 N.

Why the others are wrong:

• A: Zero ignores Moon's gravity (objects have weight, just less than on Earth).
• B: 35 N misapplies 1/6 scaling to a 210 N Earth weight (actual mass is 210 kg, not 21 kg).
• C: 210 N confuses Moon weight with buggy's Earth weight for a smaller mass.

Final answer: D