Question

Question #1: A maglev train uses powerful magnets to lift the train above the tracks as it moved forward. Such a design reduces which of the following forces?

a. rolling friction
b. gravity
c. air resistance
d. fluid friction

I think the answer is "b" because gravity could make the train go down, but with those powerful magnets then it helps the train.

Answer 1

rolling friction

Answer 2

Ok, that sounds reasonable, but wouldn't gravity affect the movement of the train?

Answer 3

try maglev in wikipedia , i think 'a' is appropriate :)

Answer 4

I just read the information and it looks that you are right. Thanks. 😀

Answer 5

:) np i learned a new thing today caus of u thanks to u too :)

Answer 6

Hey, I just turned in the assessment. You helped me avoid a zero, thanks for your work, and it looks like you also learned something. :-)

Answer 7

Rolling friction is the correct answer. Why not gravity. The question is about REDUCING some force. You CAN reduce the friction since the wheels are not touching the track but you can NOT reduce gravity. That is present in the same amount where ever the wheels are; i.e., above the tracks, on the tracks, below the tracks, etc. That force is