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 spro wicxfj4 5i8luz0..3 qajn6yuckets at the rear wheel and three at the ped+ao e vhg9k9cn;mi91eal cranks. In which gear iea;cho nm+i9gk99 1e vs 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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