PHYSICS BRIDGE DATA AND ANALYSIS SHEET
Please Follow all directions, answer all questions, and turn in AT THE END OF TESTING ALL BRIDGES!
Name: / Period: / Date Turned In: / Bridge Length (cm): / Bridge Width (cm): / Bridge Height(cm): / Approximate
total # of hours spent working on your bridge
Load
Held (g): / Bridge
Mass (g): / Load Held /
Bridge Mass = EFFICIENCEY SCORE: / Rank In Class: / Teacher Use
Subjective Grade
/ 50 / Teacher Use
Efficiency Grade
/ 50 / Teacher Use
Other
Grade
/ 50 / Teacher Use
TOTAL
Grade
/ 150
PART I: ANSWER BEFORE TESTING!
1. What made you decide on your design? Discuss some of your thoughts and ideas.
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2. What part of your bridge do you think is the strongest?
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3. Prediction: What part of your bridge do you think is the weakest, or where exactly do you think it will break?
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4. What kind of glue did you use? ______
5. Did you look up bridges in books or on the Internet to give you ideas and help with your design? If so, where (specifically)? If not, why not?
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6. Did you pay special attention to real life bridges over these past four weeks? What details or designs did you notice?
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7. Staple your computer printout from West Point Bridge Designer (WPBD) CAD program to this sheet. Did you
think using the computer to get an initial design was helpful? ______Why or why not? ______
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8. Did you stick with your original WPBD design? ______If not, why did you change it? ______
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9. ***èPlease READ CAREFULLY: IF you did NOT stick with your original WPBD design, please STAPLE a SKETCH (or computer printout) of your FINAL, finished bridge design--the ONE YOU ACTUALLY BUILT--to this form, IN ADDITION TO your original West Point Bridge Designer printout. ***è If you DID build your bridge according to your original design, you DO NOT need to have an additional drawing! !
· On your ACTUAL design picture, include dimensions, where you will sit the block, etc.
10. What Physics did you use in building your bridge?? Include any knowledge about Force, Tension, Solids, Structures, Inertia, Gravity, Angles, Newton's Laws, or ANYTHING ELSE you can think of!!!!!!! BE SPECIFIC, as this analysis is a large part of your grade. Staple your own paper onto this if you need more room.
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PART II: DO THE FOLLOWING AFTER TESTING; for all math problems, SHOW all formulas, work, & units:
11. a) Show with jagged (zig zag) lines on your bridge diagram attached to this form, WHERE your bridge BROKE!
b) Draw VECTORS on your printout or drawing showing the FORCES acting on your bridge during testing.
· (Free-Body Diagram.)
12. What would you change about your bridge if you had it to do over, and why? Be specific!
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13. Whose bridge worked best in the class, and why? Be specific in your explanation!
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14. What was the FORCE OF WEIGHT on your bridge just as it broke? ______
(Show how you calculated this.) F=mg
15. What was the PRESSURE the block with weight exerted on your bridge? ______
(Show how you calculated this.) P=F/A
16. What "Work" was done on your bridge by the Earth pulling the mass down? ______
(Show how you calculated this.) W=Fd
17. a) IF all that Work could be changed to Kinetic Energy, how much Kinetic Energy would ______
the mass have as it plowed downward through your bridge?
b) How do you know? ______
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18. What happens to the Work put into the bridge? Name and describe all the energy you see being
transferred or changed as you test your bridge! Give EVIDENCE for these changes.
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19. What was the distance from bucket to floor? ______cm = ______m
20. How long did it take the bucket to hit the floor? t = √2d/g (derived from d = vit + ½ at2)
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21. What is the average velocity of the bucket as it falls toward the floor? v = d/t ______
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22. Momentum of the bucket as it falls to the floor? SHOW all work, formulas, math, units, & answer. p = mv
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23. What did you learn from this project overall that might not be covered directly in one of the previous questions?
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24. On a scale of 1-10 (1 being low, 10 being high), what would you rate this activity as far as interest?______
25. fun? ______
26. educational? ______
27. What suggestions for improvement do you have for this project?
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Alabama State Course of Study Objectives: Culminating project in authentic assessment covering objectives 1, 2, and 4, the physics objectives for 1st semester. The other 6 objectives are covered 2nd semester. Fewer objectives are 1st semester due to learning math, metrics, problem solving, significant figures, factor label/dimensional analysis, and other skills necessary to scaffold physics learning objectives.
Science, Grade 9 - 12, Physics, 20051.) Explain linear, uniform circular, and projectile motions using one- and two-dimensional vectors.
• Explaining the significance of slope and area under a curve when graphing distance-time or velocity-time data
Example: slope and area of a velocity-time curve giving acceleration and distance traveled
• Describing forces that act on an object
Example: drawing a free-body diagram showing all forces acting on an object and resultant effects of friction, gravity, and normal force on an object sliding down an inclined plane
2.) Define the law of conservation of momentum.
• Calculating the momentum of a single object
• Calculating momenta of two objects before and after collision in one-dimensional motion
4.) Describe quantitative relationships for velocity, acceleration, force, work, power, potential energy, and kinetic energy.
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