2. 3000. kg car is moving across level ground at 5.0 m/s when it begins an acceleration that ends with the car moving at 15.0 m/s. Is work done in this
situation? How do you know?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up