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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 1.3 mi B Car a = 8.2 ft/s2; v = 134 mi/hr a = 6.2 ft/s2; v = 132 mi/hr a = 4.2 ft/s2; v = 130 mi/hr a = 2.2 ft/s2; v = 128 mi/hr

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 1.3 mi B Car a = 8.2 ft/s2; v = 134 mi/hr a = 6.2 ft/s2; v = 132 mi/hr a = 4.2 ft/s2; v = 130 mi/hr a = 2.2 ft/s2; v = 128 mi/hr

Mathematics For Machine Technology
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter59: Areas Of Rectangles, Parallelograms, And Trapezoids
Section: Chapter Questions
Problem 79A
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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 1.3 mi B Car a = 8.2 ft/s2; v = 134 mi/hr a = 6.2 ft/s2; v = 132 mi/hr a = 4.2 ft/s2; v = 130 mi/hr a = 2.2 ft/s2; v = 128 mi/hr O
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 1.3 mi B Car a = 8.2 ft/s2; v = 134 mi/hr a = 6.2 ft/s2; v = 132 mi/hr a = 4.2 ft/s2; v = 130 mi/hr a = 2.2 ft/s2; v = 128 mi/hr O
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