[填空题]
A 55-kg person riding a b+ 7/wwon0g7zz0 rsicpike 9xpgptt*dwce4+rbw( 18 - ats puts all her weight on each pedal when climbing a hill. The pedals rotate isap(r -+84b* t 1twgxceptd w9n a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?