# Block-and-tackle force
# Scope: Ideal reeving with a supplied aggregate efficiency.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

load = 400 N
segments = 4
efficiency = 0.9

effort := load/(segments*efficiency) [N]

check effort budget: effort <= 150 N

scenario alternative: load = 320 N