1. When anaircraft returns to the aircraft carrier and lands, it goes from412 kilometers per hour (kph) to 0 kph in4.6 seconds. What is the acceleration(in m/s2)?
2. You find a 30 N box on the middle of a set of stairs and carry the box up a flight of stairs to a deck, raising its elevation by 5 m. Then you drop the box off of the deck. As the box reachesits original level (the box is moving when it reaches the original level because it has not reached the ground), its kinetic energy is?