A “moving sidewalk” in an airport terminal moves at 1.0 m/s and is 35.0 m long. If a woman steps on at one end and walks at 1.5 m/s relative to the moving sidewalk, how much time does it take her to reach the opposite end if she walks (a) in the same direction the sidewalk is moving? (b) In the opposite direction?

Solution 31E Step 1: Given data Length of moving sidewalk (l) = 35 m Speed (v) = 1 m/s Speed of a woman (v ) =w1.5 m/s Problem (a) Time taken her to reach the other end if she walks along the same direction on it Step 1: Relative speed v =s +v w v s = 1.5+1 v = 2.5 m/s s