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 5fuc(e nf. f0*goc58; kfbt54gdtt ygre/ ,nyj+sykyn.nj.uo9)nph l 2ar wheel and three at the pedal cranks. In which gear is njs.2.y+juonnn /l9 yh k)y p,it harder to pedal, a small rear sprocket 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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