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 seveb 4j io4j -afjk2g g 1d;mw-tahf937yqn sprocketlwgefksu5e3v/; fz:q5m 2gi6s at the rear wheel and three at the pedal cranks. In which gear is it harder to pedal, a small rear sprocket;luf6w z /3:vsmkf5e e 2igqg5 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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