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# What is bending moment and torque and its difference?

Updated: 8/11/2023

Gunjankumar82

Lvl 1
13y ago

Torque_vs_Couple">Torque_vs_Couple">Torque_vs_Couple">Torque vs Couple

• The turning effect produced by a force on a body is called torque. It is calculated

as force multiplied by perpendicular distance.

• A couple is a special case when there are two equal but opposite forces acting on

a body that rotate it.

Wiki User

11y ago

Wiki User

13y ago

The terminology is, unfortunately, somewhat confusing; what I learned to call "torque" in a U.S. physics high-school book - a product of force x distance - is called "moment" in some other countries. Then there is the "moment of inertia", which is really rotational inertia, and a quite different concept. The Wikipedia article on "Torque" explains the differences interminology in more detail.

Wiki User

11y ago

The difference corresponds with one's nontechnical intuition about the difference between bend and twist.

Just as a bend deformation is different than a twist deformation, the labelling of the force times distance (moment) is different.

For twisting, cross-sections normal to the moment vector rotate with respect to each other in plane.

For bending, the cross-sections normal to the moment vector do not rotate with respect to each other.

A picture would be helpful. Some information is in related links.

Wiki User

14y ago

Torsion is twist. Hold a rod in your hands and turn one hand clockwise and the other counter-clockwise. That is torsion.

Moment is bending. Stand on the end of a diving board. That is a moment.

Wiki User

16y ago

torque-meant for curvilinear and moment for linear motions