You are observing the poles along the side of the road. You have already stopped and measured the distance between adjacent poles as 33.1 m. You are now driving again and have activated your smartphone stopwatch. You start the stopwatch at t = 0 as you pass pole #1. At pole #2, the stopwatch reads 11.8 s. At pole #3, the stopwatch reads 30.7 s. Your friend tells you that he was pressing the brake and slowing down the car uniformly during the entire time interval from pole #1 to pole #3. (Assume you are driving in the positive direction when t = 0.) (a) What was the acceleration (in m/s²) of the car between poles #1 and #3? (Indicate the direction with the sign of your answer.) m/s² (b) What was the velocity (in m/s) of the car at pole #1? (Indicate the direction with the sign of your answer.) m/s (c) If the motion of the car continues as described, what is the number of the last pole passed before the car comes to rest? pole #1 pole #2 O pole #3 pole #4 pole #5 0000

You are observing the poles along the side of the road. You have already stopped and measured the distance between adjacent poles as 33.1 m. You are now driving again and have activated your smartphone stopwatch. You start the stopwatch at t = 0 as you pass pole #1. At pole #2, the stopwatch reads 11.8 s. At pole #3, the stopwatch reads 30.7 s. Your friend tells you that he was pressing the brake and slowing down the car uniformly during the entire time interval from pole #1 to pole #3. (Assume you are driving in the positive direction when t = 0.) (a) What was the acceleration (in m/s²) of the car between poles #1 and #3? (Indicate the direction with the sign of your answer.) m/s² (b) What was the velocity (in m/s) of the car at pole #1? (Indicate the direction with the sign of your answer.) m/s (c) If the motion of the car continues as described, what is the number of the last pole passed before the car comes to rest? pole #1 pole #2 O pole #3 pole #4 pole #5 0000

Name: You are observing the poles along the side of the road. You have alre
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Description: You are observing the poles along the side of the road. You have already stopped and measured the distance between adjacent poles as 33.1 m. You are nowdriving again and have activated your smartphone stopwatch. You start the stopwatch at t = 0 as y

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

Displacement, Velocity and Acceleration

In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.

Linear Displacement

The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.

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Question

You are observing the poles along the side of the road. You have already stopped and measured the distance between adjacent poles as 33.1 m. You are now
driving again and have activated your smartphone stopwatch. You start the stopwatch at t = 0 as you pass pole #1. At pole #2, the stopwatch reads 11.8 s. At
pole #3, the stopwatch reads 30.7 s. Your friend tells you that he was pressing the brake and slowing down the car uniformly during the entire time interval from
pole #1 to pole #3. (Assume you are driving in the positive direction when t = 0.)
(a) What was the acceleration (in m/s²) of the car between poles #1 and #3? (Indicate the direction with the sign of your answer.)
m/s²
(b) What was the velocity (in m/s) of the car at pole #1? (Indicate the direction with the sign of your answer.)
m/s
(c) If the motion of the car continues as described, what is the number of the last pole passed before the car comes to rest?
O pole #1
pole #2
pole #3
pole #4
O pole #5

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