76. The approximate distance d (in feet) that drivers travel after noticing that they must come to a sudden stop is given by the following formula, where x is the speed of the car (in mi/h): d = x + 20 If a car travels 75 ft before stopping, what was its speed before the brakes were applied?
76. The approximate distance d (in feet) that drivers travel after noticing that they must come to a sudden stop is given by the following formula, where x is the speed of the car (in mi/h): d = x + 20 If a car travels 75 ft before stopping, what was its speed before the brakes were applied?
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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Question
The approximate distance d (in feet) that drivers travel after
noticing that they must come to a sudden stop is given by the
following formula, where x is the speed of the car (in mi/h):
d x x2
20
If a car travels 75 ft before stopping, what was its speed
before the brakes were applied?
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