[填空题]
A 55-kg person riding ahur4fh- mxh u-6e 51sx bike puts al+y4 ggqhhik3u7f**rm l her weight on each pedal when climbing a hill. The pedals roqfg+7m*gh4k*uh ry i3tate 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?