[填空题]
A 55-kg person ridingd,ajez:xg*+h 6un ;gyv,,fci/a8ksmufj h)buf /4b- a bike puts all her weight on each pedal when climbing a hill. T)/mj ua4-h8 uffksb/bhe pedals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?