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M EXSC 50X ' lab repo et 29-11 23/X -LinkedIn x p Mail-ba x-Q strength × Q nutrition Q LON-CAxe physics c X × × Updated x - ' C Secure https://loncapa2.physics.sc.edures/sc/gblanpied/courses/usdib/joneslib/chapter3/jonesc3p28.problem?symbzu 03012791 ea535ael scl1%2fdefault-1472840769 | Nicholas Ballowe (Student section: 1) 2018 Sp, Phys 201 (wilson) Messages Courses Help Logout Main Menu Course Contents Course Contents » » HW 2 Relative Velocity Sidewalk Notes Bookmark Evaluate tCommunicate -Print e. Info Relative Velocity Sidewalk Due in 2 hours, 40 minutes (c3p28) A passenger rushing to catch a plane at the airport walks on a moving sidewalk at a speed of 3.5 km/h relative to the sidewalk in the direction that the sidewalk is moving. The sidewalk is 85 m long and moves with a steady velocity of 1.6 km/h. How long (in s) does it take for the passenger to get from one end of the sidewalk to the other, that i to cover the 85 m? Submit Answer Tries 0/10 How much time does the passenger sae by taking the moving sidewalk instead of just walking beside it? Submit Answer Tries 0/10 Through what distance does the passenger walk relative to the moving sidewalk? Submit Answer Tries 0/10 If the passenger's stride is 80 cm, how many steps are taken in going from one end of the moving sidewalk to the other? Submit Answer Tries 0/10 This discussion is closed 4, Send Feedback 809 PM O Type here to search 2/11/2018 2Explanation / Answer
Apply kinematic equation
s= ut + 1/2 at^2
since moving with constant side velocity a= 0
s = ut
t = s/ u
= 85/ (1.6 + 3.5) * 1000/3600
= 30 s
(b)
the time save is
t' = 85 m/3.5 * 5/18 = 87.42 s
saved time is 87.42 s - 30 s = 57.42 s
(c)
s = u t' = 3.5 *5/18 * 87.42 = 84.99 m
(d)
number of steps
n = 84.99/0.8 m = 106 steps
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