Static Friction

Definition

Static friction is the force that prevents two surfaces from sliding past each other when they are not moving relative to each other. It acts parallel to the contact surface and opposes any applied force trying to initiate motion.

Analogy

Imagine trying to push a heavy box across the floor. The static friction is like someone holding onto the box, making it harder for you to start moving it.

Related terms

Kinetic Friction: The force that opposes motion between two surfaces when they are sliding past each other.

Coefficient of Friction: A value that represents how rough or smooth two surfaces are in contact with each other, affecting the amount of friction between them.

Normal Force: The force exerted by a surface perpendicular to another object pressing against it, which affects the magnitude of friction.