Spring 2016 RoFi: Feet Material Verification Test
Christopher Andelin (Project Manager)
Mario Ramirez (Systems Engineer)
Qui Du (Manufacturing Engineer)
Andrew Laqui (Electronics and Controls Engineer)
Henry Ruff (Electronics and Controls Engineer)
Table of Contents
Feet Material Verification Test
Mario Ramirez (Systems Engineer)
Requirement
Nonslip material on the bottom of RoFi’s feet shall have a friction coefficient of 0.9 +/- 0.05.
Test Objective
To verify that the material on the bottom of RoFi’s feet has a friction coefficient of 0.9 +/- 0.05 with a laminated podium.
Tools
Figure 1 shows the tools I used to calculate the friction coefficient of RoFi’s shoes.
Figure 1: Tools
Preliminary Calculations
Figure 2 indicates the vectors involved in my experiment.
Figure 2: Incline Vectors http://i.stack.imgur.com/lMCD8.png
μ = friction coefficient
Equation threshold where static object begins to move: m*g*sin(theta) = μ*m*g*cos(theta)
Procedure
Step 1: Weigh desired mass and attach non-slip material.
Figure 3: Mouse Pad Attached to Mass
Step 2: Place mass and material on an incline.
Figure 4: Starting Location and Angle
Step 3: Tilt surface until slipping occurs and record the angle.
Figure 5: Mass Slipped
Step 4: Calculate friction coefficient using equation.
Results
A second material was tested along side the mouse pad to show a difference in friction coefficients.
Figure 6: HD Non-Slip Pad
Figure 7: Mouse Pad
Reference
http://www.physicsclassroom.com/class/newtlaws/Lesson-2/Types-of-Forces