Zak, his mother rearrange the furniture in their living room, moves a 60 kg sofa 5.9 m with a constant force of 40 n. what is the work done by zak on the sofa? neglect friction. answer in units of j

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