The leaves were blowing until it hit the wall and the wall stops the leaves. If the wall wasn't there the leaves would keep flying until it hits something.
The farthest ball had more force from the thrower. The closest ball had less force by the thrower and it didn't go as far as the other ball because it states in Newton's second law that when a object has more force it goes farther. If the balls had the same amount of force, but one have more mass will not go as far.
Two rocks got thrown, one was a boulder and the other one was a Pebble. Guesse which rock made a bigger splash? The Boulder because it has more mass and is bigger and heavier, which means it has a bigger outcome