Friction Slope Simulator Toy app for iPhone and iPad

About
An open source physics simulation based on codes written by Wolfgang Christian and Loo Kang Wee.

Introduction

The Block Sliding On An Incline Plane mobile JavaScript model illustrates the forces and dynamics of a block sliding on a surface. This simulation uses the accelerometer on your mobile device to read the direction of the gravitation field g. You may need to lock the orientation of your screen to maintain a fixed view as you tilt your device. For use on computers without an accelerometer or for classroom use, the "No sensor" mode simulates a tilted device in the view.
A force body (free body) diagram showing the normal force (red), the gravitational force (black), and the force of friction (green) is shown. Users can set the initial position and velocity and can adjust both the static and kinetic coefficient of friction when the simulation is paused. Test your knowledge of incline plane dynamics by answering the following questions and comparing your answers with the simulation results. Remember to press the play button after you set the initial values.
Initial values, such as x0 and v0, can be set when the simulation is paused but not when the simulation is running. (Non-editable input fields have a grey background.) You may also drag the block when the simulation is paused. The reset button returns the system to its default state while the reset time button returns the system to the previous values of x0 and v0.


Interesting Fact
This app produce real numbers to coincident with the real world data.
This App is paid if you want to further support the development of Open Source Physics (Thank you for your support and contribution!)

and if dont want to pay, the free version is available here.
http://iwant2study.org/ospsg/index.php/423



Acknowledgement
My sincere gratitude for the tireless contributions of Francisco Esquembre, Fu-Kwun Hwang, Wolfgang Christian, Félix Jesús Garcia Clemente, Anne Cox, Andrew Duffy, Todd Timberlake and many more in the Open Source Physics community. I have designed much of the above based on their ideas and insights.