[填空题]
A 55-kg person ridingwbqf5w 7rv 2l 8k8/ayb a bike p,9 jt3smn b1cjuts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 171j t,cmnb39 js cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?