Answer:
Due to gravitational force
We know that,
weight (W) = m. g Newtons
Where m = mass , in Kg
g = gravitational force (m/s²)
= 9.8 m/s (it is constant on earth)
So, from equation we knew that Weight is proportional to the gravitational force assuming fixed mass.
On the moon the gravitational force (g) is very less compared to the earth gravitational force, i.e., 1.62 m/s²
Therefore from equation of weight W = m. g is very less by considering the gravitational force on moon.
So, obviously weight changes on moon due to gravitational pull