If the braking distance of a medium sized car that is going at 50 miles per hour, it's braking disatnce is about 200 feet.

Does it take twice as far to stop a car that is going twice as fast? Explain. Thanks. Please help.

DragonSlayer554 Jul 15, 2014

#1**+11 **

Best Answer

Energy is half the mass times the square of the velocity.

$$2^2=4$$ (This 2 represents the (doubling) increase in velocity)

Disregarding other considerations, it will take 4 times the distance.

7up

SevenUP Jul 15, 2014

#2**0 **

Thanks, 7UP. So, it is 4 times the distance for the car to come into a complete stop?

DragonSlayer554 Jul 15, 2014