7점 (19/20) May 2022 IB Physics HL IA (직접 실험)

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본 문서는 2022년 May 2022 Session에 작성한 물리 IA입니다. 주제는 “Investigating the effect on length of arrow track on the shooting distance of the crossbow” 로, 벡터와 고전역학으로 다른 물리 IA들에서 자주 쓰이는 대중화된 공식들이 아닌 차별되는 저만의 공식을 찾았습니다.

수리물리학과 미적분이 Formula derivation에 다량 포함되어 있어 Exploration Criteria에서 고득점을 하고 싶은 분들에게 강력 추천하며, 직접 실험을 하여 데이터를 수집하여 Uncertainties를 Assess하는 과정을 자세히 기술했습니다.

 

[본문내용]

Investigating the effect on length of arrow track on the shooting distance of the crossbow

 

Introduction
Since I was in the 6th grade, I used to build machineries such as a rubber band gun or catapult out of Lego and fire it to a target placed. As my building techniques have accumulated over time, I am able to reach the level of building crossbow which fires actual Lego brick propelled by the
power of rubber band.

While constructing another crossbow, I had an intuitive thought. Dragging the bullet as far as possible from where the rubber band is originally hanging by making the arrow track long might result in an increase of the shooting distance and the speed of the bullet. However, making such changes did not make noticeable changes in velocity of the bullet nor the shooting distance of the crossbow. This intrigued me to investigate whether increasing the length of arrow track will have an effect in increasing the shooting distance.

Background information
We can model the shape of a crossbow as the diagram given below, where stands for Arrow track in short and stands for the length of a limb of the crossbow, as seen in Figure 2 below.
The distance travelled by the bullet could be calculated by multiplying the velocity of the bullet and the time taken for it to come to contact with the ground…

 

  • 총 페이지수: 16 pages
  • 과목명: Physics
  • 주제: Investigating the effect on length of arrow track on the shooting distance of the crossbow
  • The file is in PDF format. 
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7점 (19/20) May 2022 IB Physics HL IA (직접 실험)

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