[填空题]
A 55-kg person riding95gec1;osl4op8 vbf 6t; orooh03zhr./5t jkbua h4c a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of ra4uc0 /htazk.35rhhbj dius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?