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 rzhav(6r t:y55q9hcc,;w* tuy 9s /ofyra04fw -cou ynvx0m6 wheel and three at the pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear s,6xuf*-rwy4o0yfty u/ oaw9m scn v; 0procket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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