power output in kg•m/min =
= ((wheelchair pushing force) + (incline force)) * (velocity in m per minute)
where:
• kg•m/min is a measure of power equal to about 0.1635 watts, and is equivalent to pushing a 1 kilogram weight a distance of 1 meter in 1 minute
• 1 kilometer per hour = 16.66 meter per minute
wheelchair pushing force on tile surface =
= (0.018 * (person's body weight in kilograms)) - 0.461
wheelchair pushing force on a carpeted surface =
= (0.033 * (person's body weight in kilograms)) - 0.247
incline force =
= ((weight of person in kg) + (weight of wheelchair in kg)) * (sine of incline in degrees)
where:
• incline is given in degrees from 0° to 5°
• the sine of 1° is 0.01745
