Velocity Problem (person/subway)

[whitehorsey]

1. If you are walking forward at 2 m/s in a subway that is going 80 m/s, then someone outside the subway will observe you to be moving at?3. I think you just add it up so 82 m/s?Also, what happens if velocity is zero, is acceleration nonzero or is there not enough information to tell what acceleration is?

 

[PeterO]

1. If you are walking forward at 2 m/s in a subway that is going 80 m/s, then someone outside the subway will observe you to be moving at?


3. I think you just add it up so 82 m/s?


Also, what happens if velocity is zero, is acceleration nonzero or is there not enough information to tell what acceleration is?

With the subway car going past at that speed [288 kilometres per hour!] anyone outside the subway will probably have their eyes shut and be hanging onto a railing for dear life!

That aside - the person would be seen to be traveling at 82 m/s.

There does not seem to be enough information to ascertain and acceleration.

 

[whitehorsey]

With the subway car going past at that speed [288 kilometres per hour!] anyone outside the subway will probably have their eyes shut and be hanging onto a railing for dear life!

That aside - the person would be seen to be traveling at 82 m/s.

There does not seem to be enough information to ascertain and acceleration.

Thank You!