Final answer:
On Earth, a 120 kg astronaut weighs 1200 N, while on the Moon they would weigh approximately 200 N.
Step-by-step explanation:
On Earth, the weight of an object depends on the force of gravity. The acceleration due to gravity on Earth is approximately 9.8 m/s². In this case, a 120 kg astronaut weighs 1200 N on Earth.
On the Moon, the acceleration due to gravity is only about 1.67 m/s². To calculate the weight of the astronaut on the Moon, we can use the formula: weight = mass * acceleration due to gravity. Therefore, the weight of the 120 kg astronaut on the Moon would be:
weight = 120 kg * 1.67 m/s² ≈ 200 N