1. Forces: Bridge Suspension Lab
Seo
Physics

2. Objectives
To find the mathematical relationship between the Force and the support to the Object
To apply understanding of how Forces are directly related to the strength of the Object

3. Materials Colored & Non-colored Toothpicks (75 per group)
Popsicle Sticks (2 per group)
Glue
Wax Paper
Graph Paper
Ruler

4. Guidelines
3 Per Group
Bridge will be length =22 cm, width= at least 5 cm
and height =6.5 cm
Toothpicks Length = 6.5 cm
Lighter Bridges that hold more weight will get high points
Each group is given 75 toothpicks to build the bridge
Two Popsicle Sticks – ONLY APPLIED ON THE FRONT AND BACK ENDS TO SUPPORT THE BRIDGE. ANYWHERE ELSE WILL GET A PENALTY!!!

5. Schedule Monday Day 1: Sketch/plan Bridge design
Tuesday Day 2: Making of the Bridge
Wednesday Day 3: Finish Bridge, and Post-Lab Questions
Test Day: To Be Announced (Before Break)

6. Grading Layout Total: 80 pts Lab Grade
10 pts: Drawing/design of the Bridge
25 pts: Participation, making of the Bridge
15 pts: Post-Lab Questions
5-30 pts : Strength of the Bridge (TBA)
Penalty : - 5 pts
Total: 80 pts Lab Grade

7. 1. Draw a Free Body Diagram of your bridge
1. Draw a Free Body Diagram of your bridge. List and label all the Forces
2. What is the reaction force from the weights pushing onto the bridge? Name the type of the Force
3. Did your Blueprint match with the bridge you have constructed? Explain
4. How would you have made had you had more resources to make this bridge?
5. Estimate how much mass your bridge will hold (in grams)
6. What kind of Bridge were you thinking of making?
7. How would pressure be affected if you were to have more surface area on width of the bridge?