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Friction2D

Rough-interface wedge

Distinguish actual static-friction demand from limiting friction in blocks, ladders, wedges, and belt systems.

Open the complete lesson

Advanced engineering statics simulation

Statics Friction Simulation Suite

Five distinct dry-friction models with explicit assumptions and scenario-specific free-body diagrams.

Use the standard symmetric impending-motion approximation with two friction angles.

Supported load
120 N
N
20–500

Drag for exploration or enter an exact value. Press Enter to apply and Escape to restore.

Wedge angle
30 deg
deg
5–80

Drag for exploration or enter an exact value. Press Enter to apply and Escape to restore.

Top-interface coefficient
0.45
0.05–1.00

Drag for exploration or enter an exact value. Press Enter to apply and Escape to restore.

Bottom-interface coefficient
0.30
0.02–0.90

Drag for exploration or enter an exact value. Press Enter to apply and Escape to restore.

Calculated stateimpending
PW
Required input
347.07 N
Mechanical advantage
0.346
Effective angle
70.93°
Model
symmetric
Impending upward motion
P≈Wtan⁡(θ+ϕ1+ϕ2)P\approx W\tan(\theta+\phi_1+\phi_2)

This is a clearly labeled symmetric rough-interface approximation, not a universal wedge formula for every contact geometry.

Concept question: Predict the governing force or friction demand.

Model scope and verification

Scope: Educational rigid-body statics model using the selected geometry, stated idealizations, and displayed SI units.

Acceptance check: Check the governing equilibrium, compatibility, geometry, or limiting-condition statement before accepting the numerical result.

Related simulations

Block on an inclined planeRough ladder against a wallBelt-friction explorerSliding versus overturning