Marshmallow Catapult Competition
Objective: Construct a catapult that throws standard marshmallows as far as possible using only gravitational potential energy (GPE)
Value: 120 points in project category
Description: This is a performance assessment, meaning the your grade will be based on how your project does, not on how hard you worked. This is an individual project, with no partners. The only source of energy for the catapult is a falling weight that you provide. The weight may be made of any material including water, sand, iron, lead, etc. The entire project must fit in a box 18” X 9” X 12”, stowable in your locker. Projects that do not fit in this box will receive deductions of 2 percentage points for every inch beyond the specification. Example, a 20” long project would lose 4 points from the final grade. The projects will be tested in the science wing hallway, which has a ceiling height of 9 feet.
The use of elastic bands, springs, rockets, chemical energy or anything else that adds energy to your projectile will disqualify your project and result in a grade of “F”.
Deadlines:
10 pts Diagrams (overhead and side) with desc. and dimensions: Th, Feb, 16
10 pts Materials Due for two day building session: W, Feb, 22
Final Project Due: W, April 4
Grade Rubric for Performance Assessment
D = 10-12.99 meters
D+ = 13-14.99 meters
C- = 15-16.99 meters
C = 17-18.99 meters
C+ = 19-20.99 meters
B- = 21- 23.99meters
B= 24- 27.99 meters
B+ = 28-29.99 meters
A- = 30 -32.99meters
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