My Catapult By:Mariana Peters

Introduction

  • Romans won wars
  • smartest war weapon destroy cities
  • Weapon was a catapult.
  • Romans changed how wars were fought
  • history lesson
  • Science presentation.

Physics Concepts

This is a Trebuchet catapult.
  • And for the Trebuchet the formula is X*V*Ti
  • Vx is equal to the initial velocity times the cost of θ.
  • If we assume air resistance is negligible.
  • Then the v(x ) component won’t change during the launch.
This a Mangonel catapult.
  • For Mangonel the formula is F=k(x)
  • The arm has to be at a 45॰angle
  • In order for the arm to throw the ball 5 meters

History of the Catapults

  • Mangonel made 400BC
  • It was invented by the Romans
  • overhead arch
  • At least 1,300 ft.
  • Trebuchet made400BC
  • maximum force
  • Rocks for throwing
  • Made to destroy walls
  • Cities it killed a lot of people

This video is an example of a Trebuchet.

This shows a example of a Mangonel

Qualitative Data

This is my Qualitative Data

Quantitative Data

This is my graph

My Diagram Photo

My catapult
  • Parts of my catapult.
  • 11 different brackets; 10 L brackets and one Hinge.
  • brackets hold the wood in place,reinforced screws; the hinge holds the arm in place.
  • wood that stops the arm at 45 degrees
  • bottom of the catapult there are 4 rubber feet
  • Counter weights hold the catapult down.
  • Moved spring to outer eye hooks
  • Added Bungee
  • Tested again
  • Added another Bungee
  • Tested again
  • Change the angel about 48 degrees
  • Changed holder for ball less depth

My Catapult Test Videos And Photos

This is my catapult

Videos

This is test number 2

This is test number 1

Conclusion

  • Spring/bungee stretched back equals more potential energy
  • When released compression potential energy turns into knit energy
  • launching the lever
  • transferred from spring to the arm into the tennis ball
  • Constructing my catapult the is trick was to find the proper length of the arm
  • Tension-spring or bungee best launching angle approx. 45 degrees

If you want to throw eggs and stuff at your siblings go build a catapult.

Credits:

Created with images by dakzxz - "sunset novovoronezh summer" • juliacasado1 - "trebuchet catapult medieval weapon" • ryochiji - "IMG_1454.JPG"

Made with Adobe Slate

Make your words and images move.

Get Slate

Report Abuse

If you feel that this video content violates the Adobe Terms of Use, you may report this content by filling out this quick form.

To report a Copyright Violation, please follow Section 17 in the Terms of Use.