1. The problem statement, all variables and given/known data Alright for this thing, we had to pull a cart up a inclined plane and time how long it took to get to the bottom. Distance from ground to top of inclined plane is - 0.125m Length of Board is - 1.21m Mass of cart - 1.09kg Force to pull cart up - 1.4N Time it took for cart to roll down board - 1.92s So I need to calculate: Energy Input (pulling cart up) Energy Output Efficiency 2. Relevant equations W = Fd Eff = Useful output energy/Input Energy x 100% 3. The attempt at a solution So im guessing Energy Input is W=FD W=(1.4)(1.21) W = 1.694 J Would Energy output be E = 1/2mv^2?