Question Detail
Question
A couple consists of two forces of 75 N each, acting on a wheel. The forces are parallel, opposite in direction, and their lines of action are 0.4 m apart. What is the torque exerted by this couple?
Correct Answer
Option B is the correct answer.
Detailed Explanation
The torque produced by a couple is calculated as the product of one of the forces and the perpendicular distance between them. Here, τ = Force × distance = 75 N × 0.4 m = 30 Nm.
Hint
Apply the formula for the moment of a couple: τ = F × d, where d is the separation distance.