3 boxes are connected by strings and are being pulled along by a rope. The boxes have masses of 1kg, 2kg and 3kg. Consider Friction to be negligible. If the boxes are pulled along at an acceleration of 4m/s^2, What is the tension in the rope pulling them?

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