The length of a bicycle pedal arm is 0.173 m, and a downward force of 116 N is applied to the pedal by the rider. What is the magnitude of the torque about the pedal arm's pivot when the arm is at an angle of (a)43.2°, (b) 90°, and (c) 180° with the vertical?
Torque:
T=rF sin ---------1
a)
T= 0.173×116× sin 43.2 =13.73 Nm
b)
T=0.173×116× sin 90 =20.068 Nm
c)
T= 0.173×116× sin 180 = 0 Nm
The length of a bicycle pedal arm is 0.173 m, and a downward force of 116...
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