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 thp4 tjh :uhok9sb 3d()ee pedal o bds9:4) 3 kuehj(pht cqs(gk:9vr,db fibr:m44i9 w cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sprocket? Why? In which gear is it harderc9fbrsri9 :w,kbgm:4 d( vqi4 to pedal, a small front sprocket or a large front sprocket? Why?

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