gc textbook chapter 8 Rotational Motion (id: f1a5b03e2)

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本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified

[问答题]
A 21-speed bicycle has seven sprockets at the rear wheel and three at thml* l; n)sr;eoe6+(kyi 3nt1lsu3)5 9) g lzblt +msf) fgpdaeu pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sprocfi9tg) 6)n1fyks+) s3d 3+lag5e t (umpbl luzket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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