[填空题]
A 55-kg person riding a bike puts all h3lmihpu( d/vpcx/ 9qb gtw; 6 (+fplq.ze u( zkpmlk)sof 0.8/er weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm)kupo( k l/ zme8zf0.s. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?