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 slg62h x kzu,9xprockets at the rear wheel and three at t.8* sa yab fhcy6u p;dx5rr3ta0ys7z;he 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 smalaf;sua6y xy cz7;*pra.0 8t5drhsy 3bl front sprocket or a large front sprocket? Why?

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