Non-conservative Force
A force for which work done depends on the specific path taken, dissipating mechanical energy into heat, sound, or internal energy.
Governing formula
W_non-cons = ΔME = ΔKE + ΔPE
SI unit
N
In depth
Work done around a closed loop by non-conservative forces is non-zero, converting mechanical energy into thermal energy.
Examples in the real world
Friction, air resistance, viscosity, and tension during inelastic deformation.