Originally Posted by
supramax
Andy_ K,
It's NOT a vacuum example. It's proven in a vacuum (with the feather/hammer or whatever). The air resistance is negligable with a penny and a 5 lb barbell plate. Drop them (same time and height) and they'll reach the ground at the same time.
Yes... in a vacuum objects will fall at the same rate.
That fact has no bearing on the topic at hand since we are not riding in a vacuum.