Speed and acceleration Speed-time graphs. The motion of any moving object can be described by its speed– time graph. Data from the graph can be used to calculate acceleration, ...

From this you can see that the acceleration up and down the incline are indeed different (so there is friction). Up the incline I have an acceleration of 0.1435 m/s 2 and down I get 0.10596 m/s 2 .

Velocity-time graphs are used to describe the motion of objects which are moving in a straight line. They can be used to show acceleration and to work out displacement. Part of Physics Dynamics ...

If I average the acceleration in the y-direction from the phone, I get about 0.05 g's or 0.49 m/s 2. This isn't going as well as I had hoped. Let's move on again to another app.