A lift (elevator) has a passenger car held up by a cable that passes over a light, frictionless pulley and is attached to a counterbalance. As the passenger car moves up, the counterbalance moves down. The table lists some masses: - passenger car: $520\,\text{kg}$ - counterbalance: $640\,\text{kg}$ - passenger: $80\,\text{kg}$ What is the magnitude of the acceleration of the car when it carries only one passenger and the pulley is free to rotate?
- A$0.032\,\text{m s}^{-2}$
- B$0.32\,\text{m s}^{-2}$
- C$0.61\,\text{m s}^{-2}$
- D$0.65\,\text{m s}^{-2}$