Mastering Physics: Homework #3 (phy 111) Adaptive Follow Google Chrome https://
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Question
Mastering Physics: Homework #3 (phy 111) Adaptive Follow Google Chrome https:// mastering physics.com 353607458&offset; next Session PHY 11 Fall 2015 Homework #3 Adaptive Follow-U Problem 2.14 While riding on a bus traveling down the highway, you notice that it takes 2.3 min to travel from one roadside mile marker to the next one. Part A What is your speed in mi/h? Express your answer in miles per hour to two significant figures. 26 mi My Answers Give Up Correct Part B How long does it take the bus to travel the length of a football field? Express your answer in seconds to two significant figures. 9.40 Submit My Answers Give U Incorrect, Try Again, 7 attempts remaining Help Close Signed in as N Resources previous I Item 3 l next question set Provide Feedback ContinueExplanation / Answer
(a) Distance covered = 1 mile
Time taken = 2.3 min = 0.038 h
Speed = distance/time = 1 mile/ 0.038 h = 26 mile/h
(b) length of football field = 120 yards = 0.068 miles
Width of a football field = 160 feet = 0.03 miles
Total distance to be covered = 2( length + width) = 0.196 miles
Speed of bus = 26 mile/h = 0.0072 mile/s
Time taken = Distance covered/ Speed = 0.196/0.0072 = 27 s