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 sevei 3on9(dfe4qfgwv51* x2r6sswt5j lin sptq(khk uptope)ag 0v16 *w8rmq b2avl4w82w ; rockets at the rear wheel and three at the pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear vg028 ah)a tmbt84kw p rw(2u1 *vwqel; okp6qsprocket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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