1. The problem statement, all variables and given/known data So we did a lab this week in my physics class. We had a car on a horizontal table, that was attached to a string with weights (The weights were over the edge of the table.) We then calculated the experimental acceleration and the calculated acceleration. These numbers were different. My teacher asked us "What was causing the difference between the calculated acceleration and experimental acceleration..." He also mentioned something to do with Newton's laws. Do you know the answer/Can help me out? HUMAN ERROR IS NOT THE ANSWER...And the the time was taken by a electronic device. 2. Relevant equations g = 9.8 m/s 3. The attempt at a solution I really dont know how to start! whats causing the difference!