TAILIEUCHUNG - What is a Mouse-Trap Car and How does it Work?

Not all qualified organizations are listed in Publication 78. For example, churches, synagogues, temples, and mosques are not required to apply to the IRS for recognition of exemption in order to be qualified organizations and are frequently not listed. If you have questions, call Customer Account Services at the above number. If you want to learn more about a charity before donating your vehicle, use the resources listed under Assistance Through the Charity, Through State Officials, and Through the IRS at the end of this publication. . | What is a Mouse-Trap Car and How does it Work A mouse-trap car is a vehicle that is powered by the energy that can be stored in a wound up mouse-trap spring. The most basic design is as follows a string is attached to a mouse-trap s lever arm and then the string is wound around a drive axle causing the mouse-trap s spring to be under tension. Once the mouse-trap s arm is released the tension of the mouse-trap s arm pulls the string off the drive axle causing the drive axle and the wheels to rotate propelling the vehicle. This most basic design can propel a vehicle several meters for any first-time builder. But in order to build vehicles that can travel over 100 meters or extreme speed cars that can travel 5 meters in less than a second you must learn about some of the different variables that affect the performance of a mouse-trap car. For example how does friction affect the overall distance that a vehicle can travel How does the length of the mouse-trap s lever arm affect the performance By reading each section of this book you will learn about many of the different variables that will affect a vehicle s performance. Also you will learn how to modify different variable in order to build a top performing iýr vehicle. Getting started Surface Friction 2 A ball rolling across the floor will eventually slows to a stop. The reason the ball slows to a stop is because of friction. Friction is a force that always opposes motion in a direction that is opposite to the motion of the object. An object that slides to the right experiences friction towards the left. If it was not for friction the ball would roll forever as long as there was nothing like a wall to stop its motion. Your mouse-trap car is affected by friction in the same way as the rolling ball friction will slow it to a stop. Friction will occur anytime two surfaces slip slide or move against one another. There are two basic types of friction surface friction and fluid friction. In some situations fluid friction

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