[填空题]
A 55-kg person riding a bra1 sz* abg7aq aay-3;ike puts all her weight on each pe fd96zvuoc 1 :v:cthi6dal when climbing a hill. The pedals rotate icfv oc:6uv:6tzih9d 1n a circle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?