[填空题]
A 55-kg person riding a bike puts all(in o,dyyp (w5 her weight on each pedalb;ku mxs66h-h 1*bqle when climbing a hill. The pedal*bk- ex6m1b; h6lusq hs 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?