[填空题]
A 55-kg person riding 5c5fiu glwfb wp9lqs ,4j8 dtc/zw42( a bike puts al6nnw*l z fo: ue1t;trqna-*e :l her weight on each pedal when climbing a hill. The pe etno:ru n wz1:l;a6etnf*q-*dals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?