A roller coaster typically takes 6.5 s to come to a complete stop from traveling at 30 m/s. If it has a force of 540 N, what is the mass of the coaster

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

Which of the following are guidelines to follow for obtaining accurate observations

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.