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3. An example of helpful friction is A. Car tires wearing out C. Writing on paper with pen B. Getting holes in socks D. Scraping your knees on the floor
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3. An example of helpful friction is

A. Car tires wearing out C. Writing on paper with pen
B. Getting holes in socks D. Scraping your knees on the floor

User Mark Harrah
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3 votes

Answer:

i think its C. Writing on paper with pen

plz let me know if i was right

User Enda
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