Question

An Astronaut of mass 65.0kg (weighing 637 non earth) is walking on the surface of the moon, Which has a mean radius of 1.74×10 power 6m and a mass of 7.35× 10 power 22kg. what is the wieght of astronaut on moon? what is the free fall acceleration at the surface of the moon?

Answer 1

The acceleration due to gravity on moon:

$$g=\frac{GM}{R^2}=1.62\text{ m/s}^2.$$

The weight is

$$W=mg=65\cdot1.62=105.3\text{ N}.$$