Question

In case of torque of a couple, if the axis is changed by displacing it parallel to itself, torque will
A. Increase
B. Decrease
C. Remain Constant
D. None of these

Answer 1

Hint: The rotational motion of an object is a circular path, in a particular orbit. It is also defined as the motion of that body where the all particles move in a circular motion with a term that is angular velocity about a specific point.

Complete step by step solution:
The term torque measures how much force acting on an object due to this object can be rotated.
Here’s the new term pivot point, few people know about that point, it is the point where an object rotates about an axis.
Now, with the help of an expression, the torque is the cross product of the force and the distance.
\[Torque = Force \times dis\tan ce\]
The main difference is the torque a couple so, the torque is produced by the single force. So, the turning effect produced is known as torque and also known as moment of force. And the couple is produced due to the two forces that have the same magnitude but their direction is opposite and they don’t have the same action line.
The couple is the pair of equal forces of parallel that are opposite in the direction. The only effect of a couple is to produce or prevent the turning of the particle.
$\tau = F \times d$
Here, d is the distance between the two equal forces.
So, the distance between the forces remains the same. There is no change in the force, if we change their axis. So, the torque will remain the same.

So, the correct answer is “Option C”.

Note: In rotation motion, the particles rotate throughout an axis. In circular motion, the object moves in a circular ring or in a circle. The example of the rotation motion is Rotation of the Earth.
In translational motion, it involves the sliding of an object in dimensions but in rotational motion, the particles continue their spins, around an internal axis.
The Si unit of torque is (Newton meter). We know that (Newton meter) is the same as the Joule. So, because of the SI unit people think it is energy. So, it is not energy or work but the torque SI unit is Newton meter not Joule.