Question

jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance. in free fall, will the crumpled or flat paper reach the ground first?
the crumpled paper will reach the ground first.
the flat paper will reach the ground first.
both papers will reach the ground at the same time.
it is hard to tell which would reach the ground first without experimentation.

Explanation:

In a vacuum, there is no air resistance, so the only force acting on both papers is gravity. All objects accelerate at the same rate due to gravity regardless of their shape or mass when air resistance is eliminated.

Answer:

Both papers will reach the ground at the same time.