Choose two different shoes (sneaker and dress shoe, work boot and slipper, etc.). These can be

your own or someone else's (those of spouse, child, friend, etc.) They do not have to be new?

use whatever you have, in any condition.

Place one shoe on a ramp of any material that will not bend or deform under the shoe's weight.

Use wood, metal, plastic, or even heavy-duty cardboard. Make sure the sole of the shoe and the

ramp are relatively clean of debris.

Slowly raise one end of the ramp until the shoe begins to slide and record the angle of the ramp at

that time. Do this six times.

Find the average angle at which the shoe begins to slide. Use a protractor to measure the angle or

take a height measurement to a defined mark and calculate the angle using a trig function. Note that

Your angles should be fairly consistent. If an angle seems off?inconsistent with the other angles?discard it and try again. In the end, you should have six consistent (but not necessarily equal) angles.

The shoe doesn't have to slide all the way down the ramp. The angle you're looking for is the one at which the shoe begins to move.

Repeat with the second shoe.

Analysis

Using the equation we derive in class, calculate an average ?S for both shoes.

Is average ?s the same for each shoe? How closely does average ?S match accepted values?

Shoe 1 0 Type of shoe: Brand: Condition: - Type (material) of sole: INSERT PICTURE OF SHOE 1 Use: (Where or when do yon wear it? ) Shoe 2 Type of shoe: Brand: Condition: Type (material) of sole: INSERT PICTURE OF SHOE 2 Use: (Where or when do yon wear it? ) \fCalculated Coefficients of Static Friction SHOE 1 SHOE 2 [INSERT COEFFCIENT OF [INSERT COEFFICIENT OF STATIC FRICTION] STATIC FRICTION]Conclusion Were your results consistent with your predictions or expectations? Are they consistent with published results? (Be sure to include link to your reference(s).)