[填空题]
A 55-kg person riding a bipqv3 1+d5kj 9tb7vk efke puts all her weight on each pedal wsvbh 0li: -,u sh)noc4hen climbing a hill. The v lb4c :0i-os )su,hhnpedals 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?