this problem deals with freely falling bodies A woman is reported to have fallen 144 ft from the 17th floor of a building, landing on a metal ventillation box, which she crushed to a depth of 18.0 in. she suffered only minor injuries. Neglecting air resistance, calculate (a) the speed of the woman just before she collided with the ventillator, (b) her average acceleration while in contact with the box, and (c) the time it took to crush the box. wow im so lost. how do u use the 17th floor anf dent made in the ventillator??? can someone start all 3 parts for me?