[填空题]
A 55-kg person riding a bike puts bjpa7t*0wfxts5z .is)qtgk4 , -6pkx aw 6(scoh fw :o nhktz5m7-9xc.ll her weight on each pedal when climbing a hill. The pedals rotate 6 f 5(9ctn:wxo-zw 7.cskmohhin a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?