[填空题]
A 55-kg person riding a bike puts zrg4/a au:zl+ ol96iy all her (:b*vyu zxgo+ s :i-evweight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 bze*(iv -+uvox:sg : ycm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?