[填空题]
A 55-kg person riding a bike puts all heriu/r 8lysao.in(kb 6/ weight on each pedal wheun nf*6,.g5-+fba ych9iipba n climbing a hill. The pedals rotatagup*56fc y+h -bnf.,inb9 a ie 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?