Answer to Question #23665 in Mechanics | Relativity for Abdullah

Question

Im a young student of class 8th
here's what i want to ask
If two objects, one with bigger mass(but same surface area,which means air resistance will be same) and one with smaller mass are dropped from air which onw will fall first?
if the same objects(with same material and size, which means friction will be same) are slided from a ramp which one will reach down first?
if same force is applied to both the objects (friction and air resistance is same) which one will speed up more?
In my book it is written "in fact, the mass of an object does not affect how an object speeds up under the pull of gravity"
i dont think its right(book is Heinamann Science 3)
Do you agree? i dont.
Please explain this to me as im very serious and anxious about it and use simple language and formulas and no complex formulas which i wont understand as im only 14.
(if possible please send the answer also to my email:[e-mail])