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 sev,c(bxcq g, ,mxen sprockets at the rear )t1)n2px/nnxa ww3 z;i0fwhp+jlf i;wheel and three at the pedal cranks. In which gear is it harder to pedal, a small rear spl3n h0 pi;j n zti)+fax;)nxf/1p2wwwrocket or a large rear sprocket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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