9. Motion over a surface will cause least friction on the__
a. surface of a thick rug
b. bottom of a new snicker
c. grooved surface of a car tire
d. wet surface of a soap bar
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9. Motion over a surface will cause least friction on the__
a. surface of a thick rug
b. bottom of a new snicker
c. grooved surface of a car tire
d. wet surface of a soap bar
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Answer:
d
Explanation:
wet surface of soap bar is smoother than the other choices