arth exerts a gravitational force on objects
that is attractive (towards Earth’s surface).
"Near Earth’s surface, this force produces a
constant acceleration downward.
To measure this acceleration, we need to slow
down the action.
Galileo was the first to accurately measure this
acceleration due to gravity.
By rolling objects down an inclined plane, he
slowed the motion enough to establish that the
gravitational acceleration is uniform, or constant
with time.