gc textbook chapter 8 Rotational Motion (id: f1a5b03e2)

[问答题]
A 21-speed bicycle has sev q*zaye9*x)v5gn 3byj ,h*nh aen sprocketsst b. cmw18i7tfg de); at the rear wheel and three at the 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 )fe tw7g c.btsi ;md81large front sprocket? Why?

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