A train which is traveling at 100 mi/hr applies its brakes as it reaches point A and slows down with a constant deceleration. Its decreeased velocity is boserved to be 60 mi/hr as it passes a point 1/2 mile beyoind A. A car moving at 50 mi/hr passes B at the same instant that the train reaches point A. In an unwise effort to beat the train to the crossing, the driver "steps on the gas" Calculate the constant acceleration a that the car must have in order to beat the train to crossing by 4 sec and find the velocity v of the car as it reaches the crossing. Note: 1 mi = 5280 ft Train 1 mi 100 mi/hr 50 mi/hr B Car 1.3 mi

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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A train which is traveling at 100 mi/hr applies its brakes as it
reaches point A and slows down with a constant deceleration. Its
decreeased velocity is boserved to be 60 mi/hr as it passes a
point 1/2 mile beyoind A. A car moving at 50 mi/hr passes B at the
same instant that the train reaches point A. In an unwise effort to
beat the train to the crossing, the driver "steps on the gas" Calculate
the constant acceleration a that the car must have in order to beat the
train to crossing by 4 sec and find the velocity v of the car as it
reaches the crossing. Note: 1 mi = 5280 ft
Train
1 mi
100 mi/hr
50 mi/hr
B
Car
1,3 mi
Transcribed Image Text:A train which is traveling at 100 mi/hr applies its brakes as it reaches point A and slows down with a constant deceleration. Its decreeased velocity is boserved to be 60 mi/hr as it passes a point 1/2 mile beyoind A. A car moving at 50 mi/hr passes B at the same instant that the train reaches point A. In an unwise effort to beat the train to the crossing, the driver "steps on the gas" Calculate the constant acceleration a that the car must have in order to beat the train to crossing by 4 sec and find the velocity v of the car as it reaches the crossing. Note: 1 mi = 5280 ft Train 1 mi 100 mi/hr 50 mi/hr B Car 1,3 mi
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