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 thd2drf dobsj33:1jkj 0lwo:e-e rear wheel and three4ae;ca ak i*niy1ksl*3*fn o 5 at the pedal cranks. Inaai*y*ilken sa5n 3k*fco41 ; which gear is 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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