A BRAKING PROBLEM In coming to a stop, a car leaves a skid mark 92.0m long on a highway. Assuming a deceleration of 7 m/s², what is the speed of the car just before breaking? NOW, TO BREAK YOUR SPIRIT A 75-m-long train begins uniform acceleration from rest. The front of the train has a speed of 18m/s when it passes a railway worker who is standing 180m from where the front of the train started. What will be the speed of the last car as it passes the worker?

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter4: Motion In Two And Three Dimensions
Section: Chapter Questions
Problem 82AP: A race car entering the curved part of the track at the Daytona 500 drops its speed from 85.0 m/s to...
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A BRAKING PROBLEM
In coming to a stop, a car leaves a skid
mark 92.0m long on a highway.
Assuming a deceleration of 7 m/s2, what
is the speed of the car just before
breaking?
NOW, TO BREAK YOUR SPIRIT
A 75-m-long train begins uniform
acceleration from rest. The front of the
train has a speed of 18m/s when it passes
a railway worker who is standing 180m
from where the front of the train started.
What will be the speed of the last car as
it passes the worker?
Transcribed Image Text:A BRAKING PROBLEM In coming to a stop, a car leaves a skid mark 92.0m long on a highway. Assuming a deceleration of 7 m/s2, what is the speed of the car just before breaking? NOW, TO BREAK YOUR SPIRIT A 75-m-long train begins uniform acceleration from rest. The front of the train has a speed of 18m/s when it passes a railway worker who is standing 180m from where the front of the train started. What will be the speed of the last car as it passes the worker?
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