Torque, Couple & Equilibrium of Rigid Bodies
Which of the following sentence is true?
a. Moment of a couple is independent of the axis of rotation or the points of application of forces. b. Moment of a couple produces translational acceleration.
c. Moment of a couple can be balanced by single force.
d. Moment of a couple depends upon the axis of rotation or the points of application of forces.
Show answer and solution
Answer: (d)
- Moment of a couple is the same about every point, so it is independent of the axis: a is true, d is false.
- A couple has zero net force, so it gives no translational acceleration: b is false.
- A couple can be balanced only by an equal and opposite couple, not a single force: c is false.
- So the answer is (d) a.