Question: what is the relationship between the force of gravity on a planet and the mass of the astronaut?
Answer: This means that for each kilogram of mass, an object will experience 1.6 N of force. Therefore, an astronaut will weigh less on the Moon than they do on the Earth. Weight is the force acting on an object due to gravity - it has the unit newtons (N) and acts towards the centre of a gravitational field.