What is a Mousetrap Powered Car?

What is a Mousetrap Powered Car?
A mousetrap powered car is a vehicle that uses a mouse trap for a motor. There are many different ideas but the most common and probably the most successful ideas is to attach a string to the mouse trap and axle or the string pull. In this method one end of a string is attached or tied to the arm on the mousetrap and the other end of the string is wound around an axle. By winding the string around the axle the mouse trap's spring is stretched and now you have your stored energy. As the mousetrap car is released the mouse trap pulls the string off of the axle causing the wheels to turn and off the vehicle goes.
mousetrap car basic propulsion theory

Step #1A string is attached to the mouse trap's lever arm and them attached to the drive axle. Notice that the string has a loop tied at the axle end; this loop is caught by a hook on the axle so that the string is attached to the axle BUT it is allowed to release itself after the pulling force is spent. It is important to have the hook on the axle or the string will simple slip of the axle with out propelling the vehicle. Keep in mind that the hook must be short or it will re-catch the string and cause the car to stop.

科學方法

標準的科學方法通常包括以下五步：

1. 發現問題
2. 提出假設
3. 設計並展開實驗
4. 觀察現象
5. 得出結論

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網上科學探究：洗潔精對皮膚的影響

科學探究技巧

什麼是「科學探究」？

科學探究

研究者應用科學知識和方法，對某個自然現象或問題進行探討和研究。科學探究的技能可包括觀察、作出假設、設計和進行實驗、記錄和分析結果、作出結論，並將實驗結果有效表達。