Free Body Diagram Maker

Isolate one body and its external forces

A free-body diagram represents a chosen object separately from its surroundings, with arrows for the external forces acting on it. It provides the starting point for a mechanics analysis.

Reason about forces before solving

Use it for contact forces, tension, friction, or motion on a slope. The fixed example is a labeled box-on-ramp illustration; review its assumptions and force labels before treating it as a worked solution.

Keep forces and assumptions distinct

1. Define the system boundary. Include forces acting on the selected object, not forces it applies to others.
2. Identify actual interactions. A force should correspond to a contact or other physical interaction.
3. Choose useful axes. Label axes separately from the force vectors.
4. Avoid counting components twice. A force and its resolved components are alternative representations of the same vector.
5. Use symbolic unknowns. Do not invent magnitudes or apply a friction formula without the relevant conditions.

Build a diagram for your stated scenario

MyMap organizes force labels and vectors from your description. Ask to clarify an interaction or separate components, then check the physics against the problem statement.