In this blog I have mentioned, how we can make object move by adding force. Force and Velocity both are component of Physics. So, to make our gameobject come under influence of Physics we must attach a rigid body to it and then we can code it to move by adding force in different direction. - See more at: http://findnerd.com/list/view/How-to-Move-Make-Objects-by-Adding-Force-in-Unity/2396