# Understanding Torque and Moment: Exploring the Difference | Homework Discussion

• princejan7
In summary, the book explains that the force P causes a torque around the x axis, which is also known as a moment. The terms torque and moment can be used interchangeably, but torque is typically used when twisting is involved. In this case, the force P causes both a bending moment, Mz, and a torque, Mx, at the base of the post support.

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## The Attempt at a Solution

The book says that the force P causes a torque about the x axis. Why is it not a moment about x?
Why is it specifically a torque in this case?

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Torque and moment are synonymous in this case.

princejan7 said:

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## The Attempt at a Solution

The book says that the force P causes a torque about the x axis. Why is it not a moment about x?
Why is it specifically a torque in this case?
The terms 'torque' and 'moment' are sometimes used interchangeably, although 'torque' often is used when twisting is involved. Here, the force P causes, at the base of the post support. both a moment about the z axis, Mz, and a moment about the x axis, Mx, where Mz bends the post (a bending moment) and Mx twists the post (a torque).

## 1. What is the difference between torque and moment?

Torque and moment are often used interchangeably, but they actually have different meanings. Torque is a measure of the force that causes an object to rotate around an axis, while moment is a measure of the tendency of a force to cause rotation around a specific point.

## 2. How are torque and moment calculated?

Torque is calculated by multiplying the force applied to an object by the distance from the axis of rotation, while moment is calculated by multiplying the force by the distance from the point of rotation.

## 3. What are some real-world examples of torque and moment?

Examples of torque include opening a door, using a wrench to turn a bolt, and pedaling a bike. Examples of moment include a seesaw, a lever, and a wheelbarrow.

## 4. Why is understanding torque and moment important?

Understanding torque and moment is important in many fields, including engineering, physics, and mechanics. It allows us to analyze and predict the behavior of objects under different forces and rotations, which is crucial for designing and building structures, machines, and vehicles.

## 5. How can we increase torque and moment?

Torque can be increased by applying more force or increasing the distance from the axis of rotation. Moment can be increased by increasing the force or increasing the distance from the point of rotation. Additionally, using a lever or gear system can also increase torque and moment.