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 at f nd fg6w*kp,krr9:u 3the pedal ipk 6,uw)z5cl cranks. In which gear is it harder to pedal, a small rear sprocket or a large rear sproc6z5,)p clki uwket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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