[填空题]
A 55-kg person riding a bike puts all her weight o9+aw m uoeg0;3lsx (wf0m jnri 0k04zmp) kubhptw/5 .2cx .vfn each pedal when climbing a hill. The pedals rotate in0h/xwp p0m5i.m fu) kk0.nzvj4brc 2t a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?