You order a ride from Lyft, but the driver accidentally passes you by and, at that exact moment, steps on the brakes. He uniformly accelerates from 55 km/hr to rest in 3.0 seconds. After stopping, he takes 5 seconds to check his phone (while completely stopped). He uniformly accelerates to 10 km/hr in reverse in 2.0 seconds and travels at a constant speed until arriving at where you have been standing to pick you up (you remain at rest at the origin on the position graph the entire time). Assume that when he is next to you, he slams on the brakes and comes to rest in a distance of 40 cm. (C) What distance did it take for the driver to stop the first time (in meters)? (D) What was the total time that elapses from when the driver passes you to when he stops next to you. (E) What was the average velocity (magnitude and direction) of the driver (from the time he passed you until the time he picked you up)? (F) What was the average speed of the driver (from the time he passed you until the time he picked you up)?

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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You order a ride from Lyft, but the driver accidentally passes you by and, at that exact moment, steps on the brakes. He uniformly accelerates from 55 km/hr to rest in 3.0 seconds. After stopping, he takes 5 seconds to check his phone (while completely stopped). He uniformly accelerates to 10 km/hr in reverse in 2.0 seconds and travels at a constant speed until arriving at where you have been standing to pick you up (you remain at rest at the origin on the position graph the entire time). Assume that when he is next to you, he slams on the brakes and comes to rest in a distance of 40 cm. (C) What distance did it take for the driver to stop the first time (in meters)? (D) What was the total time that elapses from when the driver passes you to when he stops next to you. (E) What was the average velocity (magnitude and direction) of the driver (from the time he passed you until the time he picked you up)? (F) What was the average speed of the driver (from the time he passed you until the time he picked you up)?
position
time
velocity
time
ácceleration
time
Transcribed Image Text:position time velocity time ácceleration time
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