What is contact force?

Contact force is a type of force that occurs when two objects come into physical contact with each other. It is a force that is transmitted through direct physical contact between the two objects. Contact force is a result of interactions between the atoms and molecules of the two objects that are in contact.

Some examples of contact forces include:

• Frictional force: This force occurs when two surfaces are in contact and one object slides or moves against the other. Frictional force opposes the motion of the object.
• Normal force: This force is exerted by a surface to support the weight of an object resting on it. It acts perpendicular to the surface and prevents the object from falling through the surface.
• Tension force: This force occurs when a rope, string, or cable is pulled taut. It is the force transmitted through the length of the rope.
• Applied force: This force is exerted on an object by a person, machine, or any external agent. It can be used to move or accelerate an object.

Overall, contact force is an important concept in physics and plays a crucial role in understanding the interactions between objects in the physical world.