Let's look at how contact and non-contact forces differ in their fundamental nature: A contact force is a force that acts between two bodies in contact. For example, the contact force is created when you push a table against the wall or when you pull anything upwards since there is direct touch between you and the object you are pulling.
Between bodies that are not in direct contact, a non-contact force acts. An apple, for example, fell on Newton due to the unseen force of gravity.
A force that only functions when two bodies come into physical touch.
Newton's second law of motion was discussed. It claims that applying force to a body of mass ‘m' causes it to accelerate.
If the mass of the body is ‘m,' and the acceleration it achieves after being subjected to force is ‘a,' then the force equation is:
F = ma
However, when we add force to the body, it develops momentum, resulting in a rate of change in momentum equal to the force applied. This equation F = Δp/Δt.
The following is a list of the types of contact forces:
Let's look at some contact force scenarios where you can see the difference.
Non-contact forces are listed below:
|CONTACT FORCES||NON-CONTACT FORCES|
|Only when there is a physical effort (push or pull) on an object can the forces act.||These forces are invisible by nature and can act without requiring any physical effort.|
|Vector fields can be used to depict contact forces.||Non-contact forces cannot be represented using vector fields.|
|The contact force is not linked with any field||The non-contact force is related to a field.|
|Because of the friction between two palms, friction between two bodies in touch, such as rubbing palms, produces heat.||Because of the effect of gravity, a ball in the sky will eventually fall to the ground.|
|When the bus abruptly stops, a dozing man awakens.||When two North poles of two magnets are brought together, they repel each other. When you change the direction of one of the magnets, you'll notice that they attract each other.|
How does inertia prevent motion change?
We all know that every object develops a unique property called inertia. So, if you roll a ball in a vacuum (a place where there is no external force or gravity), it will keep rolling. If the medium is changed to air, an external force, such as air resistance and gravity, will bring the ball to the ground.
Give a non-contact force example.
Let's say you comb your damp hair and then place pieces of paper near it. Because the comb picked upcharge from the wet hairs, the paper will be drawn to it.
Is raindrops falling a good example of contact force?
No, raindrops falling on earth is an example of non-contact force.