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Torque plays a crucial role in the mechanics of door handles, illustrating the importance of handle placement for ease of use. This concept extends to static equilibrium, where torque ensures balance despite forces. Moments, or torque, are essential in engineering for calculating the rotational potential of forces, and the principle of moments is key for mechanical equilibrium. Couples, generating pure rotation, are also discussed, highlighting their application in everyday mechanics.

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## Torque

### Definition of Torque

Torque is the rotational force applied to an object

### Torque in Door Handles

Placement of Door Handles

Door handles are positioned on the side farthest from the hinges to leverage maximum distance and require less force to open the door

Analogous to Long-handled Wrenches

The principle of torque in door handles is similar to the use of long-handled wrenches, which provide greater torque and ease the process of tightening or loosening bolts

### Practical Applications of Torque

Understanding torque is essential for practical applications in mechanics and engineering

## Moments

### Definition of Moments

Moments, also known as torque, quantify the potential for rotation and are calculated by multiplying the force by the perpendicular distance from the pivot point

### Importance of Moments in Engineering

Moments are vital in engineering calculations, such as determining the stability and functionality of structures and mechanical systems

### Calculation of Moments

Moments are calculated by multiplying the force by the distance from the pivot point, as seen in the example of a 100kg mass at a distance of 30m from a pivot experiencing a gravitational force of 29,430 Nm

## Couples

### Definition of Couples

Couples consist of two parallel forces that are equal in magnitude but opposite in direction, resulting in pure rotational motion without translation

### Examples of Couples

Couples can be observed in everyday examples such as turning a steering wheel

### Importance of Couples in Mechanics

Understanding couples is essential for mechanisms that require pure rotation without linear displacement

## Principle of Moments

### Definition of Principle of Moments

The principle of moments is a condition for mechanical equilibrium, stating that for an object to be balanced, the sum of the clockwise moments must be equal to the sum of the counterclockwise moments

### Application of Principle of Moments

The principle of moments is applied in determining unknown forces or masses in a system, crucial for the stability and functionality of structures and mechanical devices