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 three a8h :szqi /.mvkt ifc);t the pedal v ti /:.sh)8ifmzk qc;ms q/sc(:mkh6j pd fw8s(wmf43e9k6x cranks. In which gear is it harder to pedal, a small rear sprocket or a large reewc/h( 6 fs(dkm ksmpw8xj:6sf q4m 93ar sprocket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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