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 z vngsm*rz*bx:m1qi6*a(, o3m fl,rwnf h9p)okq)1jw/+vkfseven sprockets at the rear wheel and three at the pedal cranks. In which gear is it harder to pedal, a small re/1 nk f fq+k)9oj)hpwvar 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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