[填空题]
A 55-kg person riding a a-rg5w 68zm ba9p8c (wdnklg;z49tvqbk9(8 fpjwe-ugike puts all her weight on each pedal when climbing a hill. The pedals rotate in (pu8 jk-fw9eg a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?