# Lever: trade handle travel for lifting force
# Scope: Ideal weightless first-class lever; forces perpendicular to the arms.
load = 100 N
loadArm = 50 mm in 25..100
effortArm = 200 mm in 100..600
beamSpan := loadArm + effortArm [mm]
beamCenter := (effortArm - loadArm) / 2 [mm]
effort := load * loadArm / effortArm [N]
mechanicalAdvantage := effortArm / loadArm
part beam "Lever": box beamSpan, 8 mm, 12 mm at beamCenter, 0 mm, 20 mm
part fulcrum "Fulcrum": box 20 mm, 30 mm, 20 mm
check hand force: effort <= 40 N
scenario longer handle: effortArm = 400 mm