Answer:
The force pulling the large rock down is greater, but it takes more force to move it.
Explanation:
There's a greater force on the large rock, but it's harder to move because of its large mass. The force on the golf ball is smaller, but it has less mass, so it doesn't take as much force to move it.
So a large force on a large mass will have the same acceleration as a small force on a proportionately small mass.