Alyssa King (Student -section: YO1) 2018 Fall, PHYS 201-Y01 (cook) 2 Messa ges C

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Alyssa King (Student -section: YO1) 2018 Fall, PHYS 201-Y01 (cook) 2 Messa ges Courses Loge Course Contents... HW 3-Ch. 3 jonesc3p28.problem Notes jonesc3p28.problem Due in 3 hours, 51 minutes moves with a steady velocity of 1.8 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 75 m? passenger rushing to catch a plane at the airport walks on a moving sidewalk at a speed of 4.0 km/h reletive to the sidewalk in the direction that the sidewak is moving. The sidewak is 75 m Submit Answer Tries 0/10 How much time does the passenger save by taking the moving sidewalk instead of just walking beside R? Submit Answer Tries 0/10 Through what distance does the passenger walk relative to the moving sidewalk? Submit Answer Tries O/10 If the passenger's stride is 83 cm, how many steps are taken in going from one end of the moving sidewalk to the other? Submit Answer Tries 0/10 Send Feedback This discussion is closed E12

Explanation / Answer

1. The net speed of passenger = ( 4+ 1.8) km/hr = 5.8 km/hr

That implies, (5.8x1000)/3600 = 1.61 m/ sec

Time taken to cover 75 m = 75/1.61 = 46.58 seconds

2. If he chooses to walk besides the sidewalk then

(4 x1000)/3600 = 1.11 m / sec

Time taken by him = 75/ 1.11= 67.56 seconds

The amount of time that passenger saved = 67.56 - 46.58 = 20.98 seconds

3. He walks for 46.58 seconds at speed 1.11 m/ sec

46.58 x 1.11 = 51.70 m

4. Number of steps = 51.70 m / 0.83 m per steps = 61. 28 i.e. almost 62 steps.

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