Anyone who does not understand this is a ♥♥♥♥♥♥♥ idiot and needs to go back to middle school or high school where you should have learned this ♥♥♥♥, if you school never taught you this then everyone in charge of the decision making when it comes to curriculum should be replaced with someone who isn't ♥♥♥♥♥♥♥ stupid.

TL;DR - If you don't understand that pound of feathers and a pound of steel weigh the same there is no TLDR, you need to read this whole thing. I could make this longer but if you don't understand the basic concept of mass and weight then me making this longer will not do you any good.

1 kilogram of steel multiplied by the acceleration due to gravity gives you 9.8 Newtons (2.2 pounds). 1 kilogram of feathers multiplied by the acceleration due to gravity gives you 9.8 Newtons (2.2 pounds). Therefore, a pound (or kilogram in my example) of feather WEIGHS AND HAS THE SAME MASS as a pound (kilogram in my examples) of steel/lead.

Of course the pound of steel is going to hit ♥♥♥♥♥♥♥ harder, its one object that is not being affected by drag (air resistance) to the same degree as the bunch of individual feathers not being held together (much, much less than the feathers). Even if the feathers were held together it still wouldn't hit harder because it is less dense and thus needs more volume to get to 1 pound, because it takes up more space there is more area for friction/drag (air resistance) to act upon thus it won't accelerate as fast in free fall. Just because one would hit hard in that situation does not mean one weighs more than the other because like I said before it is a product of mass and gravity and because gravity is constant and in this situation they have the same as well they will weigh the same.

Compare that to a bundle of feathers not held together, all of a sudden you drop this bundle then all of a sudden they split up because they are a bunch of ♥♥♥♥♥♥♥ individual feather that are not held together. They will end up separating then all of a sudden you are hit by a bunch of individual feathers that do not weigh a pound that are hitting you, they are not even accelerating at normal gravitational acceleration because of the drag force (air resistance) acting on.

The difference being that if steel/lead fall on your head, it would be a smaller object because it is denser and because it is a single object held incredibly tightly together due to inter-atomic/molecular forces.