[填空题]
A 55-kg person ridinyt7( ooifk p*6k8s1 qkg a bike rva8o72h+o9y2s f dkjwa1i1 qputs all her weight on each pedal when climbing a hill. The pedals rotate in a jria ok8a+ 127wh o2yfd9vs1q circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?