All objects fall with the same acceleration, 9.8 m/s/s or 9.8 m/s2 (which we approximate as nearly 10 m/s/s or 10 m/s2).
We call this free fall.
When such objects fall, the only force acting on them is their weight, the force of gravity.
The only force on a body in freefall is the force of gravity. We call this its weight.
Since it accelerates at 9.8 m/s/s, that net force or weight must be
w = (mass )x (9.8 m/s/s),
w = m g
This acceleration due to gravity we label g.
g = 9.8 m/s2.