There are four traffic lights on a stretch of road and the distance between each traffic light is 300m. There is a 10-s lag time between successive green lights: The second light turns green 10 safter the first light turns green, the third light turns green 10 s after the second light does (and,thus, 20 s after the first light turns green), and so on. Each light stays green for 15 s. Having watched this sequence for some time, you understand that you can drive through the stretch ofroad at a range of constant speeds.You drive through the first light right when it turned green. What is the fastest speed that youcan drive through the stretch of road without running any red lights? What is the slowest speed?

Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 2.81CP: A blue car of length 4.52 m is moving north on a roadway (hat intersects another perpendicular...
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There are four traffic lights on a stretch of road and the distance between each traffic light is 300m. There is a 10-s lag time between successive green lights: The second light turns green 10 safter the first light turns green, the third light turns green 10 s after the second light does (and,thus, 20 s after the first light turns green), and so on. Each light stays green for 15 s.

Having watched this sequence for some time, you understand that you can drive through the stretch ofroad at a range of constant speeds.You drive through the first light right when it turned green.

What is the fastest speed that youcan drive through the stretch of road without running any red lights? What is the slowest speed?

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