A boy on a bicycle drags a wagon full of newspaper at 0.800 m/s for 30.0 min using a force of 40.0 N. How much work has the boy done?

A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?