How to build a catapult
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HOW TO BUILD A CATAPULT
description
How to build a catapult. We started with a dream…calculating and researching nothing…. Catapult I. Jake and his yellow shirt!. 5. 4. 3. The catapult should have thrown 150ft…. It went 10 ft. . Science is hard……. Hmmm, maybe we should’ve done the math first?. - PowerPoint PPT Presentation
Transcript of How to build a catapult
HOW TO BUILD A CATAPULT
WE STARTED WITH A DREAM…CALCULATING AND
RESEARCHING NOTHING…
Jake and his
yellow shirt!
Catapult I
5
4
3
THE CATAPU LT SHO UL D HAVE THRO WN 150FT….
It went 10 ft.
Science is hard…….
Hmmm, maybe we should’ve done the math first?
Velocity=13.626 m/secPotential Energy=0.6026 joules (Predicted Distance Traveled=66.29 feetForce=18 poundsKinetic Energy= 0.9113 joules (actual distance traveled)=100.24 feetAcceleration=3.125 ft/sec
Here’s our numbers we crunched….
AND HERE IS THE N EW PRO GRESS WE MADE…
Increased the strength to 18lbs…
Switched from wood to PVC to lose weight on our throwing arms…
Moved tower to adjust release angle from 88 deg to 45 deg, and then to an optimum 70 degrees.
Lastly, we added another bolt to the backboard to create a fast release mechanism.
Shots through changes
FEET
Are you ready for……
THE PENETRATOR????
