Ok, so it has to be a very small car, but that doesn't diminish in any way the coolness of the fact it needs neither batteries nor fuel. As the spring is released it transfers its torque to the lever. Idea Mouse Traphow To Make Home Made Mouse Trap Work Easy Saving 8 Mice In Few Minute - Youtube Mousetrap Idea Mouse Traphow To Make Home Made Mouse Bricolage When the spring mechanism is triggered, a metal bar snaps and kills the rodent. How can a mousetrap work . The mousetrap sits on the base, while on the two far ends of the base, you add the axles. If a mousetrap vehicle is struggling to move and/or needs more acceleration then the lever arms can be shortened in order to increase the pulling force. In competitions, the goal of the mousetrap car is to achieve as much forward motion as possible, on a flat surface and/or on an inclined surface. How does a mousetrap work? The law of conservation of energy says that the total energy of a system remains constant, energy ca...