0Newton’s third law tells us that the car pushes on the crew member just as hard as the crew member pushes on the car, but in the opposite direction. This is true whether the car’s engine is on and the car is moving forward partly under its own power, or the engine is off and being propelled by the crew member’s push alone. The force magnitudes are different in the two situations, but in either case the push of the car on the crew member is just as strong as the push of the crew member on the car.
