TECHNOLOGY-BASED LAB ACTIVITIES
Lab Activities (PE).pdf - langlopress.net
Lab Activities (PE).pdf - langlopress.net
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10. Analyzing results According to your data, do the coefficients of static and<br />
kinetic friction depend on the weight acting on a shoe? Explain.<br />
11. Analyzing results Should the manager of RoofRite be more concerned<br />
about the risk of slipping for smaller, lighter workers than for heavier workers?<br />
Explain why or why not.<br />
12. Reaching conclusions Of the two kinds of shoes you tested, which one<br />
would you recommend to the manager of the roofing company? Explain<br />
why you would recommend that kind of shoe over the other kind.<br />
13. Comparing results Compare the shoes you tested with the shoes that others<br />
in your class tested. In general, what are some of the common characteristics<br />
of shoes with high coefficients of friction? Of all the shoes tested in your<br />
class, which would you recommend to the manager of the roofing company?<br />
EXTENSIONS<br />
1. Evaluating safety Describe the potential safety risk for a roofer wearing<br />
shoes with a high m s but a low m k . What advantages are there for a roofer to<br />
wear shoes in which the m s and the m k are nearly the same?<br />
2. Making predictions Predict how increasing the surface area of a shoe’s sole<br />
would affect forces of friction and coefficients of friction. Devise an experiment<br />
that would test your hypothesis. If you have time, and if your teacher<br />
approves your plan, perform this experiment.<br />
3. Extending results Use the force sensor to measure the maximum force of<br />
static friction for a shoe on an inclined roof shingle. Find the angle that<br />
causes a shoe to start to slide. Calculate the coefficient of friction, and compare<br />
it to the value you obtain when the shingle is lying flat.<br />
4. Extending research Some sport sandals, climbing shoes, and hiking boots<br />
have “sticky” rubber soles that are reported to have very high coefficients of<br />
friction. Research these types of materials and prepare a report that explains<br />
how they are made and that discusses new research on similar materials.<br />
Copyright © by Holt, Rinehart and Winston. All rights reserved.<br />
30 HOLT PHYSICS Technology-Based Lab Activities
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