1. The problem statement, all variables and given/known data I have been given a set of results to analyse, regarding acceleration of a free fall object in a peice of paper, (100g mass, 10cm card) falling through a light gate at different heights, i am having problems with working out the acceleration using formulae. Distance from gate = 0.02m Time = 0.163 seconds. U = 0 i presume..or maybe not(part of my problem) S = 0.1 (the length of the card) 2. Relevant equations s = ut + 1/2at(squared) 3. The attempt at a solution I have got 9.15 once but i think it was a coincedence.