1. The problem statement, all variables and given/known data So, we did a lab wherein we rolled a 1.001kg cart down a 24.4 degree slope. We used a ticker tape timer and are trying to find the frictional force of the ticker tape timer alone. The problem is, I can't figure out how to find the acceleration for the equation 2. Relevant equations ma = mgsin(theta) - Ff 3. The attempt at a solution 1.001(a) - 1.001(-9.81)sin24.4 - Ff Do I need to use vectors? Is it just -9.8? If vectors, do I calculate it for the x or y plane?