# Help with a relativity question

1. Oct 5, 2011

### Roscoe1989

1. ok, my dad and I are trying to solve this problem, but we're both having difficulty:
"When the moving sidewalk at the airport is broken, as it often seems to be, it takes you 50 s to walk from your gate to baggage claim. When it is working and you stand on the moving sidewalk the entire way, it takes 75 s to travel the same distance. How long will it take you to travel from the gate to baggage claim?

2. Oct 5, 2011

### iRaid

t=d/(v1+v2)=d/(d/t1 +d/t2)=t1*t2/(t1+t2)

Should help?

3. Oct 5, 2011

### lewando

Still trying to find out what you are asking:

4 scenarios:
Broken -- standing = ∞ s
Broken -- walking = 50 s
Working --standing = 75 s
Working --walking = ??? is this what you are trying to find out?

4. Oct 5, 2011

### Roscoe1989

i believe so. the question is asking how long will it take to get to baggage claim if the machine is working and you are walking on in.

5. Oct 5, 2011

### lewando

Are we thinking (like in regular airports) there is a section, d1, of a non-moving floor and a section, d2, of a moving sidewalk?

6. Oct 5, 2011

### Roscoe1989

yes i think so. i copied the question exactly.
iRaid- how did you get from d/(d/t1+d/t2)=t1*t2/t1+t2?