>>1079417>you have angered newton, prepare to get schooledFree fall exhibit different characteristics to a declined roll. Mass has a factor in fighting resistance. In a declined roll, a more massive object will reach the bottom of a slope before a lighter object. Completely different characteristics to a free fall.
http://www.batesville.k12.in.us/physics/phynet/mechanics/RotMechanics/fall_slide_roll.htm