When a baby is born, the mother usually clutches him or her in a very tight manner. This is to protect the baby from any harm while it is being formed in the womb.
This physical reaction is called incubation. The baby stays that way for about a week, until its parents bring it home and begin to care for it.
As an infant grows, they need to be changed into a bed or cot and onto its back. This happens when they are out of the newborn stage and able to do so.
After turning over, infants put their hands on anything to hold onto. If you were watching them sleep before, you would not notice this; however, with this type of development, it happens faster than before.
Example of force couple
In addition to the example given earlier of a window being forced open by an equivalent resultant force, there are many examples where this phenomenon occurs.
When a window is broken and the pieces stay together, this is an example of a force couple. The two components that hold the window in place are the same as those that cause the couples in our body to function properly.
The couples in our body operate as if they were one cohesive whole, so when one part fails, the others take its place quickly and correctly. This happens with windows, too. When one gets broken, another takes its place more quickly and correctly!
If you have ever had trouble getting up after sleeping or climbing out of a bed Bugs-Eye-Buggy-Buggy style, then you might be experiencing what Couples in Our Bodies Act Like When One Part Is Broken phenomena.
Why use a force couple?
When we look at the forces acting on a door, we see a constant force from the outside world, coming in and out. We also see a couple of moments, or lag times, when this external force couples with internal pressure within the door.
These momentary pressures and changes occur when doors are opened and closed, or when they are moved. If we were to measure these pressures as weight units, then our door would be one kilogram of weight!
These momentary pressures and changes occur when doors are opened and closed, or when they are moved. If we were to measure these pressures as weight units, then our door would be one kilogram of weight!
This is not practical, so we use the forces as couplings to calculate how much lifting or pushing is needed to change the height of our doorway.
How to use a force couple?
When your motion is either a change in force or change in momentum, you can use a force couple. A force couple is a system that couples the motion of two objects or events into one event.
In this system, two forces are combined to produce an equivalent or resultant force. This resultant force acts at point o and couples the motion toward and away from point o. This system can be used to create effects such as rolling, pitching, and bouncing!
The equivalent moment acting at point o is called the coupling moment. This moment acts between the two particles and couples their motion toward or away from point o. Because this moment is proportional to the mass of each particle, it also differs for light versus heavy materials.
This article will talk about using a force couple to replace the loading by an equivalent resultant force and couple moment acting at point o.
Steps to using a force couple
In a nutshell, force couple systems calculate the resultant force required to push or pull an object through its point of action using the distance between points of action and the distance between them.
This is a simple way to calculate the equivalent moment acting at point o in your application.
You can use it to determine how much force is needed to raise an object just above its point of action and then down, or how much force is needed to lower an object just below its point of action and then up.
It works for loads as well! You can use it to figure out what kind of forces are required to move an item just a few millimeters, or several centimeters.
This method can be applied in design and development, making it useful in different fields.
Examples of using a force couple
In Abstract, a force couple is used to transfer momentum from one machine to another. These machines can be humans, medical devices, or equipment. The force couple works by creating a moment acting at point O on one object and coupling with an equivalent moment acting at point A on the other.
These moments areExecute a force couple operation and transfer momentum from one machine to another!
The operation can be for example transferring the push of one leg against the other, or moving the paired up hands in unison. The result is that the two entities exert an equal and opposite force on each other! This is done by having them differ in their resultant force. This forces them to push against each other equally!
Using this, we can recreate what happens during human exercise such as walking or running.
Drawbacks of using a force couple
While the force couple is a reliable way to produce a resultant couple, it has its shortcomings. These can be divided into mechanical and visual.
Mechanical shortcomings include the possibility of misalignment between the couple and resultant force, which may cause breakage or displacement of items. Additionally, users may not be aware of all possible couples as they are only trained to use one type.
Visual shortcomings include the absence of an equivelent signal in case of failure, degradation over time, and potential confusion with other systems.
User-friendly flaws include the lack of clear instructions or guidelines regarding usage, the potential for unnoticed damage, and the possibility of being unfamiliar with any other systems in your home.
Applications of using a force couple
When transitioning from one environment to another, the two new environments need to be prepared and safe. This can be a difficult process to stay safe and operational.
To help ensure both environments are operational and safe, introduction of new environments should include introducing an equivalent resultant force and couple moment acting at point o.
The resultant force couples systems to their surrounding environment while the couple moment acting at point o adds stability to transition sites. This additional stability reduces the risk of injury or illness when entering the new environment.
Similarly, if you were climbing a mountain, you would use the same transitional devices that move people between floors, but instead of being used on the ground, they are lowered into the new environment via a lift.
Researching a force couple
In order to determine the force couple for your application, you must first determine what action or action couples your application requires. There are four types of actions: force, contact, release, and change.
In order to determine which actions require which couples, there are six components to an action equation: force couple, contact couple, release couple, change couple, and remain in place couple.
The remaining component of an action equation is the remaining amount that remains when one of the initial components is removed.
