Introduction to Forces

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What is a force?

A force is a push or pull acting upon an object as a result of its interaction with another object.

What unit is force measured in?

Force is measured in newtons (N).

What is a contact force?

A contact force is a force that acts on objects when they are touching each other.

What is a non-contact force?

A non-contact force is a force that acts on objects without touching them.

What is gravity?

Gravity is a non-contact force that pulls objects toward the center of the Earth or any other celestial body.

What is friction?

Friction is a contact force that opposes the relative motion or tendency of such motion of two surfaces in contact.

What is tension in physics?

Tension is a force experienced by a rope or string when it is pulled tight by forces acting from opposite ends.

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