Assuming air resistance, when a tennis ball and a feather are dropped from the same height? Which statement is true: A: Tennis ball has more mass so it will fall faster. B: Tennis ball has less surface area so it will fall faster I think the answer should be A, but the textbook say B is true base on the reasoning that surface area is proportional to air resistance. My arguments are as follows: 1. The question does not suggest a feather have a greater surface area than a tennis ball. I can picture the size of a tennis ball, but size and shape of feather varies depending on the source. 2. Assuming if they explicitly state that cross-sectional surface area is greater for the feather, wouldn't the mass still play a greater effect due to the greater difference in mass between the objects vs. the difference in cross-sectional areas. Thank you.