FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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Chapter 2, Problem 78P
GO A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 950 m apart, each engineer sees the other’s train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is there a collision? If so, answer yes and give the speed of the red train and the speed of the green train at impact, respectively. If not, answer no and give the separation between the trains when they stop.
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A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other on a straight, level track. When they are 950 m apart, each engineer sees the other's train and applies the breaks. The brakes slow each train at the rate of 1.0 m/s^2. Is there a collision? If so, what is the speed of the red train and the speed of the green train? If not, what is the separation between the trains when they stop?
A red train travelling at 72 km/h and a green train
travelling at 144 km/h are headed toward each other
along a straight, level track. When they are 950 m apart,
each engineer sees the other's train and applies the
brakes. The brakes slow each train at the rate of 1.0 m s
2. Is there a collision?
If so, answer yes [in the first box] and give the speed of
the red train and the speed of the green train at impact,
respectively. [in the second and third box - give answers
as integers, and in units: m/s but without the units]
If not, answer no [in the first box] and give the distance
travelled by the red train and the distance travelled by
the green train when they stop, respectively. [in the
second and third box - give answers as integers in units
m but without the unit]
After returning from the bend, a train driver with a speed of 97 km/h recognizes a car 61 m away from the train and moving with a constant speed of 48 km/h. The train driver immediately applies the brake. If the train slows with a constant acceleration, what should be the acceleration in order to avoid from the collision of the train and car?
Chapter 2 Solutions
FUNDAMENTALS OF PHYSICS - EXTENDED
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