If a 6 kg mass has weight on Earth of about 60 N, its weight on the Moon would be about 10 N because gravity is weaker.

If a 6 kg mass has weight on Earth of about 60 N, its weight on the Moon would be about 10 N because gravity is weaker.

• A. About 60 N
• B. About 0 N
• C. About 10 N
• D. About 120 N

Answer: (C)

Weight is the gravitational force on an object, so it depends on the local gravitational acceleration g, not on the mass alone. The mass stays 6 kg, but g on Earth is about 9.8 m/s^2, giving a weight near 6 × 9.8 ≈ 60 N. On the Moon, g is about 1.6 m/s^2, so the weight becomes 6 × 1.6 ≈ 9.6 N, roughly 10 N. Since the Moon’s gravity is about one-sixth of Earth’s, the weight is about one-sixth of the Earth weight, hence around 10 N. The other numbers would require Earth-like gravity, no gravity, or stronger gravity, which isn’t the case here.

Weight is the gravitational force on an object, so it depends on the local gravitational acceleration g, not on the mass alone. The mass stays 6 kg, but g on Earth is about 9.8 m/s^2, giving a weight near 6 × 9.8 ≈ 60 N. On the Moon, g is about 1.6 m/s^2, so the weight becomes 6 × 1.6 ≈ 9.6 N, roughly 10 N. Since the Moon’s gravity is about one-sixth of Earth’s, the weight is about one-sixth of the Earth weight, hence around 10 N. The other numbers would require Earth-like gravity, no gravity, or stronger gravity, which isn’t the case here.