* Contact Forces: These forces require direct physical contact between objects.

* Non-Contact Forces: These forces act on objects even when they are not physically touching.

Elastic force arises from the deformation of an object, like a spring. This deformation happens because the object's molecules are pushed or pulled, creating a force that resists the change in shape. This force can only be exerted when the object is actually being deformed, which requires contact.

Examples of elastic force:

* Stretching a rubber band: You're applying a force to the rubber band, and it pushes back.

* Bouncing a ball: When the ball hits the ground, it compresses, and the elastic force pushes it back up.

* Pushing a spring: The spring compresses and exerts a force back on your hand.

Let me know if you have any other questions!