gc textbook chapter 8 Rotational Motion (id: 2c313f58a)

本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 通用国际物理

[问答题]
A 21-speed bicycle haab6x/. zh cr9as sevz(8 ikpyp+ i3ten sprockets at the rear wheel and three at the pedal cik8+p yit( p3zranks. 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 small front sprocket or a large front sprocket? Why?

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