[填空题]
A 55-kg person riding a bike puts all-k9 4gpj 4bzlo4af sc3 her weight on each pedal when climbnfk 09 1pf))/s hmafmoing a hill. The pedals rotate in a circle of rafnf h0m1 mo9)/pf) sakdius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?