If the arm radius is 0.25 m and the applied load is 20 N in a Prony brake, the torque is

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Multiple Choice

If the arm radius is 0.25 m and the applied load is 20 N in a Prony brake, the torque is

Explanation:
Torque is the turning effect produced by a force, and it’s found by multiplying the force by the distance from the pivot (the lever arm). In a Prony brake, the rope or strap applies a tangential force at the drum’s radius, so the torque on the shaft is simply F × r. With a radius of 0.25 m and an applied load of 20 N, the torque is 20 × 0.25 = 5 N·m. So the correct result is 5 N·m. The other numbers would require different force or radius values.

Torque is the turning effect produced by a force, and it’s found by multiplying the force by the distance from the pivot (the lever arm). In a Prony brake, the rope or strap applies a tangential force at the drum’s radius, so the torque on the shaft is simply F × r. With a radius of 0.25 m and an applied load of 20 N, the torque is 20 × 0.25 = 5 N·m. So the correct result is 5 N·m. The other numbers would require different force or radius values.

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