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 thre+h+kzk y2zqd3e at tcn)b-xsq:5g ghe pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sprocket? Why? In which gear is it5s: c)qbxng -g harder to pedal, a small front sprocket or a large front sprocket? Why?

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