[填空题]
A 55-kg person riding :sketd8r2 s03rewp*l) (rf eea bike puts all her weight on each pedal when fc,v v)b; 0zh1qit); pid 7oezclimbing a hill. The pedals rotate in a cir vfe)zzp 7dbt o0;v;1i qi)hc,cle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?