The force required to keep the wheel from turning is equal to the torque applied by the bicyclist's weight multiplied by the radius of the chain wheel.
Torque = 65 kg * 9.7 cm * sin(45°) = 463.5 Nm
Force = Torque / Radius = 463.5 Nm / 9.7 cm = 47.8 N
A bicyclist of mass 65 kg stands on pedal. The crank is .170 m long and makes a 45 angle with the vertical. The crank is attached to the chain wheel which is 9.70 cm. What force must the chain exert to keep the wheel from turning?
1 answer
1 answer