Final answer:
The power output of the elevator's motor is 15,000 watts, which is equivalent to 15 kilowatts.
Step-by-step explanation:
The power output of a motor is calculated by dividing the work done by the time over which the work is done. In the case of the lift's motor, which does 120,000 J of work in 8.0 seconds, the power output can be found using the formula: Power = Work / Time
By inserting the given values: Power = 120,000 J / 8.0 s = 15,000 W
Therefore, the power output of the motor in the lift is 15,000 watts or 15 kW (kilowatts).