Forces

Forces are a fundamental concept in physics, describing the interaction between two objects that results in a change in motion. They can be categorized into two main types: contact forces and non-contact forces.

Contact Forces

Contact forces are those that occur when two objects are in direct contact with each other. Examples of contact forces include friction, tension, normal force, and air resistance.

Friction

Friction is a force that opposes the motion of an object. It is caused by the interaction between the surfaces of two objects in contact.

Tension

Tension is a force that is transmitted through a string, rope, cable or similar object when it is pulled tight by forces acting from opposite ends.

Normal Force

The normal force is the force exerted by a surface that supports the weight of an object resting on it.

Air Resistance

Air resistance is a type of frictional force that acts against the motion of an object moving through air.

Non-Contact Forces

Non-contact forces are those that can act at a distance, without the need for physical contact. Examples of non-contact forces include gravity, electromagnetic forces, and nuclear forces.

Gravity

Gravity is the force of attraction between all masses in the universe.

Electromagnetic Forces

Electromagnetic forces are forces that occur between charged particles.

Nuclear Forces

Nuclear forces are forces that act between particles in the nucleus of an atom.

See Also

• Newton's laws of motion
• Fundamental forces
• Force field (physics)

Forces Resources
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