A car traveling at 45 miles per hour is brought to a stop, at constant decelerat
ID: 2873269 • Letter: A
Question
A car traveling at 45 miles per hour is brought to a stop, at constant deceleration, 192 feet from where the brakes are applied. How far has the car moved when its speed has been reduced to 30 miles per hour?How far has the car moved when its speed has been reduced to 15 miles per hour?
A car traveling at 45 miles per hour is brought to a stop, at constant deceleration, 192 feet from where the brakes are applied. How far has the car moved when its speed has been reduced to 30 miles per hour?
How far has the car moved when its speed has been reduced to 15 miles per hour?
How far has the car moved when its speed has been reduced to 30 miles per hour?
How far has the car moved when its speed has been reduced to 15 miles per hour?
Explanation / Answer
V = speed, X = distance
a = dV/dt
V = dX/dt
then 1/dt= a/dV = V/dX ===> VdV = adX
then you integrate and you get :
1/2(Vf
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