Question Detail
Question
A force of 180 N is applied tangential to a solid aluminum disk of radius 0.3 m. If the mass of the disk is 40 kg, calculate the torque exerted.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Torque τ = r × F = rF sinθ. Since the force is applied tangentially, θ = 90°, sin90° = 1. Therefore τ = rF = 0.3 m × 180 N = 54 Nm. The mass of the disk is not needed for torque calculation when force and radius are given directly.
Hint
Torque = force × perpendicular distance from axis of rotation.