Are we really in contact of object while performing contact forces?

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Solution

Electrostatic forces are non-contact forces; they pull or push on objects without touching them. Rubbing some materials together can result in something called 'charge' being moved from one surface to the other. Charged objects pull on other uncharged objects and may either push or pull on other charged objects.

A Contact force as the name suggests acts on a point of an object by direct contact. Forces that act between the objects are in contact with each other are called Contact Forces. These forces are produced and experienced when a body comes in contact with another body. The Contact may be Continuous or sometimes momentary. The former case is known as Continuous force and the latter case is known as impulse force. Examples
1) Pushing an object along the floor :

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Similar questions

Non-contact forces show their effect only when one object is not in contact with another object.

Q. We say that interaction of two objects are necessary for a force to come into play. In the other hand we say that non-contact forces can come into play even the objects are not in contact. Interaction is required for a force to come into play or not?

We learnt that touching is the repulsive force between atoms and that two things are never really in contact. If so then does this repulsive force vary for different things? Are there things with a repulsive force strong enough for us to see that we can't touch it?

Q. Which of the following is true about non-contact forces?
i. Non-contact forces can act only when the two bodies are in contact with each other.
ii. Non-contact forces can act only when the two bodies are not in contact with each other.
iii. Non-contact forces can act when the bodies are in contact with each other.
iv. Non-contact forces can act when the bodies are not in contact with each other.

Which of the following statements are correct about the force of friction?

1. It acts on all moving objects.

2. It opposes the relative motion between two objects in contact with each other.

3. It is a contact force.

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