# Velocity Problem (person/subway)

1. Apr 2, 2013

### 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?

Last edited: Apr 2, 2013
2. Apr 2, 2013

### PeterO

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 travelling at 82 m/s.

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

3. Apr 8, 2013

### whitehorsey

Thank You!!

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