The marble would hit the ground first because it is denser and less affected by air resistance compared to the piece of paper. Air resistance is a force that opposes the motion of objects moving through the air. Due to its larger surface area, the paper experiences more air resistance, which slows it down, causing it to take longer to reach the ground. The marble, on the other hand, has a smaller surface area and is more streamlined, experiencing less air resistance and falling more quickly.
