[填空题]
A 55-kg person riding a bi0bvfna50 mdt++lkb 3vg)lo-8 sou e3 mke puts all her wevs-7s t phv:v6ight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 c: hsvs76- vtvpm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?