torque- crank arm of bicycle...............?

T

Tigger

New member
Torque is calculated as force*distance, the distance being the length of a line which is perpendicular to the line of action of the force, and passes through the pivot point.

In the first case, since weight acts downwards, and the crank is horizontal, the crank is perpendicular to the line of action of the force, and the distance involved is the length of the crank. So the torque is -

53*g*0.165 = 85.79Nm

In the second case the distance is 0.165*sin(15), and the torque is-

53*g*0.165*sin(15) = 22.2Nm
 
The crank arm of a bicycle pedal is 16.5 cm long. If a person weighing 53 kg puts all of their weight
on one pedal,how much torque is developed if a)the crank is horizontal? and b) the crank is 15 degrees from the top?
 
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