As you hurry to catch your flight at the local airport, you encounter a moving walkway that is 83.5 m long and has a speed of 2.6 m/s relative to the ground. How long would it take you to cover the 83.5 m length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the opposite direction with a speed of 1.3 m/s relative to the walkway?

Question

aaronq · Answer

|dw:1406129783023:dw|

$\sf \Delta x=v\Delta t$

$\sf 83.5 ~m=(3.9~m/s)\Delta t$

solve for $\sf \Delta t$