It ' s really partially your mass , that changes your acceleration . It ' s also partially dependent on your surface area . Try it at homeTake a tennis ball or baseball and a sheet of paper . Drop them both , ball should hit first . Take the paper and crumple it up , then do the same experiment . Both should hit at the same time . This works because you changed the surface area of the paper . You actually didn ' t change the mass of it last time I checked , crumpling up something doesn ' t ad or subtract mass from it . This is why flying squirrels actually get to fly , they just trap air under their wings . In terms of a drag force , your mass would have an effect on your acceleration towards the ground , but in a vacuum , there is no drag force . Hope that helps !