Friction
CONTACT FORCE
FRICTION
The resistive force that opposes the relative motion or tendency of motion between two surfaces in contact.
INITIAL RESISTANCE
STATIC FRICTION
The friction that resists initial movement of a stationary object. Maximum value is limiting frictional force.
MOTION RESISTANCE
KINETIC FRICTION
The friction that acts between moving surfaces. Equation: $F_k = \mu_k N$ (Also known as dynamic friction).
PROPORTIONALITY CONSTANT
COEFFICIENT
Symbol: $\mu$ (Mu). A dimensionless value representing the degree of roughness between two contact surfaces.
PERPENDICULAR FORCE
NORMAL FORCE
The support force exerted upon an object that is in contact with another stable object. Symbol: $N$ (or $R$).
INCLINED DYNAMICS
ANGLING FRICTION
Friction on an inclined plane. The maximum angle where an object stays put without sliding is the angle of friction ($\theta$).
FLUID RESISTANCE
VISCOSITY
The internal friction of a fluid (liquid or gas) that resists flow. Higher thickness means higher viscous drag.
AERODYNAMIC DRAG
AIR RESISTANCE
Frictional force experienced by objects moving through air molecules, increasing with speed and surface area.
Friction Lab
Explore the mechanics of surface resistance and kinetic energy through interactive surface simulations. Test different materials, adjust normal forces, and measure how varying coefficients of friction influence motion and deceleration in real-time. This lab offers an intuitive digital workbench for investigating physical forces and dynamic interactions.
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