Prony brake torque is proportional to which quantities?

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Multiple Choice

Prony brake torque is proportional to which quantities?

Explanation:
Torque in a Prony brake comes from a braking force acting at a distance from the shaft. The braking force is generated by pressing brake shoes against the drum, with the normal force set by the applied load on the brake lever. Torque is the product of that braking force and the lever arm length (T = F × r). Since the braking force increases with the load, the torque ends up being proportional to both the load and the arm radius. Increasing either the load or the radius increases the torque, while it would not be correct to say it's independent of radius or inversely related to it.

Torque in a Prony brake comes from a braking force acting at a distance from the shaft. The braking force is generated by pressing brake shoes against the drum, with the normal force set by the applied load on the brake lever. Torque is the product of that braking force and the lever arm length (T = F × r). Since the braking force increases with the load, the torque ends up being proportional to both the load and the arm radius. Increasing either the load or the radius increases the torque, while it would not be correct to say it's independent of radius or inversely related to it.

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