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Friction2D

Belt-friction explorer

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.

Apply the capstan relation with wrap angle in radians and calculate torque capacity.

Belt friction coefficient
0.45
0.05–1.00

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

Slack-side tension
100 N
N
10–500

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

Wrap angle
180 deg
deg
10–360

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

Pulley radius
0.30 m
m
0.05–1.00

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

Calculated stateimpending
T₂ tightT₁ slackwrap β
Tight tension
411.12 N
Tension ratio
4.111
Torque capacity
93.34 N·m
Wrap angle
180°
3.142 rad
T2T1=eμβ\frac{T_2}{T_1}=e^{\mu\beta}

Static friction matches equilibrium demand until its limiting value is reached.

Concept question: Predict the tight-to-slack tension ratio.

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 wallRough-interface wedgeSliding versus overturning