###force required to move stationary vehicle??### I am undergoing a product development as part of my full time business. I have forgotten a lot of the Physics I learnt back in my school days and have been having trouble getting help with this issue, so I hope someone here can help. The device requires the movement of a vehicle from a stationary position and so I therefore need a formula to calculate what kind of force is needed to move varying weights of cars from stationary position. I found the coefficient of rubber on dry concrete to be 1.0 (0.8 on wet concrete) and I will also have the various weights of cars. How do I calculate the force needed to get the car moving? Does the calculation differ if all four wheels are touching the floor in comparison to having the front two wheels on a platform (and then the platform is pulled)? Any help much appreciated. Thanks, Steve.