Catapult Project - Bellefonte Area School District · It must be a catapult, NO CROSSBOWS!!! The...
Transcript of Catapult Project - Bellefonte Area School District · It must be a catapult, NO CROSSBOWS!!! The...
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Catapult Project
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Expectations
Must fire 25-30 m
Must be able to hit the target
Must be consistent grouping
It must be a catapult, NO CROSSBOWS!!!
The power must come from a mechanical
force, no pneumatics
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Target
25
22
19
16
0 –13
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Target Setup
25 m
30 m
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Two Possible Types
Traditional Catapult
Powered by an elastic force pulling forward
Trebuchet
Powered by a falling mass on the opposite
side of the throwing arm
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Traditional Catapult
First models were powered by binding
rope
Possible power sources
Bungee cords
Springs
Other elastics
Arm is generally attached at end
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Traditional Catapult Examples
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Trebuchet
Powered by falling mass
Torque in = Torque out
Must decide arm lengths
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Trebuchet Examples
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Grading
Catapult (50%)
Accuracy (25%)
Distance (10%)
Construction (10%)
Consistency (5%)
Paper (15%)
Depth of Thought (5%)
Length (5%)
Presentation (5%)
Lab Report (25%)
Data Table (5%)
Calculation Table (5%)
Calculations (5%)
Results (5%)
Testing Procedure (5%)
Diagram (10%)
Detail of Design (5%)
Presentation (5%)