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 thezvzxqzs- p+ 1*lx rh8. rear wheel and three at the ;2-tjw)z ; *nyyajsixa* uu0p pedal cranks. In 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 frout*zpxij n*; jw)u;-0a s a2yynt sprocket? Why?

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