Sliding Bar on Rails
Sliding-bar rail generator with live parameters, drag force, and v(t) coast-down.
About this tool
Rail generator — a bar sliding on rails in B has EMF=Bℓv and current I=ℰ/R. The magnetic drag F=BIℓ=B²ℓ²v/R dissipates kinetic energy: v(t)=v₀ e^{−t/τ} with τ=mR/(B²ℓ²).