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 th,ghzu-3dy7sef sbx,tc pi8:bns)4 (free at tb2q c89 ( w.aczjmfuz-he pedal cranks. In which geara9zbfu jcw (.c82-z qm 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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