2. Sharp curves especially in hill roads use barriers so that speeding cars that lose control will be prevented from falling (see diagram below). The radius of curvature is 8 meters, in a sign before the curve, the maximum speed imposed is 40kph (km/hr). A. The average midsize sedan weighs about 1500kg. The coefficient of friction between rubber and concrete is 0.45 when wet and 0.60 when dry. Is the speed limit reasonable? Justify and support your answer with calculations. (Expand space for answers) B. If you will impose a traffic rule in the said area, what should be the speed limit and other reminders that you will put as a sign? (Expand space for answers)

2. Sharp curves especially in hill roads use barriers so that speeding cars that lose control will be prevented from falling (see diagram below). The radius of curvature is 8 meters, in a sign before the curve, the maximum speed imposed is 40kph (km/hr). A. The average midsize sedan weighs about 1500kg. The coefficient of friction between rubber and concrete is 0.45 when wet and 0.60 when dry. Is the speed limit reasonable? Justify and support your answer with calculations. (Expand space for answers) B. If you will impose a traffic rule in the said area, what should be the speed limit and other reminders that you will put as a sign? (Expand space for answers)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

2. Sharp curves especially in hill roads use barriers so that speeding cars that lose control will be
prevented from falling (see diagram below). The radius of curvature is 8 meters, in a sign before
the curve, the maximum speed imposed is 40kph (km/hr).
A. The average midsize sedan weighs about 1500kg. The coefficient of friction between rubber
and concrete is 0.45 when wet and 0.60 when dry. Is the speed limit reasonable? Justify and
support your answer with calculations.
(Expand space for answers)
B. If you will impose a traffic rule in the said area, what should be the speed limit and other
reminders that you will put as a sign?
(Expand space for answers)

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