Engineering, 10.09.2019 20:30 bumeh511
Atrain which is traveling at 70 mi/hr applies its brakes as it reaches point a and slows down with a constant deceleration. its decreased velocity is observed to be 52 mi/hr as it passes a point 1/2 mi beyond a. a car moving at 52 mi/hr passes point 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.
(a) calculate the constant acceleration a that the car must have in order to beat the train to the crossing by 4.3 sec.
(b) find the velocity v of the car as it reaches the crossing.
Answers: 1
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Atrain which is traveling at 70 mi/hr applies its brakes as it reaches point a and slows down with a...
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