1. The problem statement, all variables and given/known data A stone is dropped from the top of a tower of height 40 m. The stone falls from rest and air resistance is negligible. What time is taken for the stone to fall the last 10m to the ground? A 0.38s B 1.4s C 2.5s D 2.9s 2. Relevant equations 3. The attempt at a solution I first found the final velocity for the first 30m. V^2= 2x9.8x30 (ignore directions) then i used that final velocity as my initial velocity in V=u+at where V=0. My answer is C. But its wrong.