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)

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.

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Figure 1: Tools

Preliminary Calculations

Figure 2 indicates the vectors involved in my experiment.

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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.

 

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Figure 3: Mouse Pad Attached to Mass

Step 2: Place mass and material on an incline.

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Figure 4: Starting Location and Angle

Step 3: Tilt surface until slipping occurs and record the angle.

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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.

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Figure 6: HD Non-Slip Pad

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Figure 7: Mouse Pad

Reference

http://www.physicsclassroom.com/class/newtlaws/Lesson-2/Types-of-Forces

http://physics.stackexchange.com/questions/243717/why-does-something-on-an-inclined-plane-move-forward-at-all