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+ v82yoe sihaa0o j48mz/(tni the rear wheel and three at z of;e :4oh kz,jw9*is6zm2uanh5 8fk the pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sprocf9aj hhz,;kw28e5mk6:sz* n uzo4foiket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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