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 8bnr v/mzvt;g):wakn g 5i2( zseven sprockets at the rear wheel and three at the peda.26c:jr +4mar10kvc vbbjt zt; xqb 2gl cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sprocket? Why? In which gear is it harder to pedal, a smal4b:xgjcb+ mtvt6r2qzb 1; j0 rvk 2ca.l front sprocket or a large front sprocket? Why?

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