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(a) Write down the formulas for the velocity v and for the positions of the car. You may assume that at time t = 0 the car was at position so= 0, and that was the moment when the car started do brake. (b) Find the acceleration a, and the time T that it takes for the car to come to a full stop, from the moment it started to brake.

(a) Write down the formulas for the velocity v and for the positions of the car. You may assume that at time t = 0 the car was at position so= 0, and that was the moment when the car started do brake. (b) Find the acceleration a, and the time T that it takes for the car to come to a full stop, from the moment it started to brake.

College Physics
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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(Acceleration and velocity) A car is 40 metres from a traffic light, driving at 55 km/h, when the light turns red. At that moment, the car slows down with constant acceleration a until it stops at the traffic light. (a) Write down the formulas for the velocity v and for the positions of the car. You may assume that at time t = 0 the car was at position so = 0, and that was the moment when the car started do brake. (b) Find the acceleration a, and the time T that it takes for the car to come to a full stop, from the moment it started to brake.
Transcribed Image Text:(Acceleration and velocity) A car is 40 metres from a traffic light, driving at 55 km/h, when the light turns red. At that moment, the car slows down with constant acceleration a until it stops at the traffic light. (a) Write down the formulas for the velocity v and for the positions of the car. You may assume that at time t = 0 the car was at position so = 0, and that was the moment when the car started do brake. (b) Find the acceleration a, and the time T that it takes for the car to come to a full stop, from the moment it started to brake.
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