a car manufacturer advertises that the brakes are so perfect that a car stops instantaneous. Comment.
Answers
Here you go...
Δv = at
Δv = change in velocity
a = acceleration
t = time
We can rearrange that equation to show that
a = Δv/t
In order to go from any speed to a complete stop in 0s, the acceleration would be infinite. Because of Newton's second law, F=ma, an infinite acceleration would produce an infinitely large force on the car and the passengers inside it. So either the car manufacturer is lying, or the brakes are so effective they will instantly kill everyone inside the car. Either way I'd recommend against buying it.
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Answer:
This sentence proves that the car manufacturer doesn't know the limitations of nature.
Explanation:
If the car stops instantaneously it's acceleration becomes infinite. And this would require infinite amount of energy. Since nature doesn't love infinity it's not possible that the car will stop instantaneously.
Best brakes ever made or will be made would at least take 1plank time(10^-43 second) since it's the smallest time unit that can be measured