most will probably think this is a stupid question.. becuase it is. So go easy on me.

OK, why does the weight seem heavier... when I have 2 20 pound weights on the dumbell, than when I have 4 10 pound weights on the dumbell?

The 20 pound weights are longer of course.

I did weigh them.. and they are roughly the same.. But I have to take off 5 pounds of smaller weights when using the 2 20pounders, to do the same amount of reps. I did with the 4 10 pounder.

Anybody notice this?