[填空题]
A 55-kg person riding a bike puts all h6pmh,d ro 9qq0er weight on each pedal whenh3 dwe4ystnx73c/b74b 6l qem climbing a hill. The pedals rotate in a circle of radius 17 cm.7l c/menh3w47 64dytb e3 xqsb (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?