Trial Number Average value of ' a 1 X 2 3 4 Angle of incline 5 5 5 5 X Mass of the cart 0g 250g 500g 550g X 1 a ' from velocity 0.811 0.856 0.849 0.869 0.846 versus time graph 1 a ' from the X 0.810 0.879 0.826 0.859 0.844 position versus time graph