Problem 25.

A "moving sidewalk" in a busy airport terminal moves 1 m/s and is 200 m long. A passenger steps onto one end and walks, in the same direction as the sidewalk is moving, at a rate of 2.0 m/s relative to the moving sidewalk. How much time does it take the passenger to reach the opposite end of the walkway?

Solution:

The speed of the passenger relative to the ground is 2m/s+1m/s =3 m/s (since the he is working in the same direction as the direction of the motion of the sidewalk.

Then the passenger reaches the end of the sidewalk after