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 a)( z py.jvkrfl97t tzmsf;:9zn 16w4edbr w *ut the rayud2 zq4 y1*j8hsw w3ear wheel and three at the pedal cranks. In which gear is it harder to pedal, a small rear sprocket or a large wy2y1hz* w dqj8us3a4rear sprocket? Why? In which gear is it harder to pedal, a small front sprocket or a large front sprocket? Why?

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