[填空题]
A 55-kg person ridin: 6muhw7k+mh ,*ma6lcj6 x1ohtw bs4t*sj*d1* 7v)( )uxg c lijrgtfzg a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a cir )i*c *j fgr z1l*sgx(dt7j)vucle of radius 17 cm. (a) What is the maximum torque she exerts? $m \cdot N$ (b) How could she exert more torque?