# E-bike assist and gearing
# Scope: Constant-speed tractive power with rider input and motor efficiency.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

force = 40 N
speed = 5 m/s
rider = 80 W
efficiency = 0.8

wheelPower := force*speed [W]
batteryPower := max(0 W,wheelPower-rider)/efficiency [W]

check battery power budget: batteryPower <= 250 W

scenario alternative: force = 32 N