Tool 514 · Dynamics & free-body analysis
Force Calculator
Solve Newton’s second law, combine arbitrary 2D forces, find the exact equilibrant, analyze friction on an incline, or solve centripetal-force problems — with diagrams, unit conversion and transparent assumptions.
Beyond F = maNet-force vectors, equilibrium, incline friction and circular motion.
Free-body visualEvery entered force is drawn with the resultant and equilibrant.
Static friction logicChecks whether friction can hold before applying kinetic friction.
Unit-safeSI, imperial and common engineering force/mass units.
Solve F = ma for any one variable
Leave exactly one of force, mass or acceleration blank. Signed force and acceleration preserve your chosen 1D direction.
Newton’s second law
Forces — magnitude and angle from +x, counter-clockwise positive
Label
Magnitude (N)
Angle (°)
Block on an incline — initially at rest
Positive applied force points up the ramp. Positive φ pulls away from the ramp; negative φ pushes into it. Static friction is tested first; kinetic friction is used only if static friction cannot hold.