Which of the following is an example of a couple?
A.
All of the above.
B.
The forces that are applied to the handle of a screwdriver when you twist it.
C.
The forces that are applied to a cross wench to loosen or tighten the lug nuts on a wheel of a car.
D.
The forces that are applied to the steering wheel of a car when you turn it.
Correct answer is A
A couple is a pair of forces that are equal in magnitude but opposite in direction, and that are applied to a body at different points. The forces of a couple do not produce any translation, but they do produce a rotation.
