Originally Posted by
Shimagnolo
A table tennis ball is 40mm in diameter, and weigh 2.7 grams.
A lead sphere of 40mm in diameter weighs ~380 grams.
Same size, same shape, same Cd, but different weight.
You are saying they will have the same terminal velocity.
Of course not.
The tennis ball is fuzzier.
You can stack coffee filters to compare the terminal velocities of objects of different masses having roughly the same Cd. A stack will have a higher terminal velocity than a single one. Still, I think what supramax is saying is that the difference is due to air resistance, - which is true. That's not the same as saying the lighter object has more air resistance and that's why the terminal velocity is lower.