+0

# Braking Distance Math Problem

0
540
3
+8263

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.

Jul 15, 2014

#1
+394
+11

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

Jul 15, 2014

#1
+394
+11

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
+8263
0

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

Jul 15, 2014
#3
+3450
+5

This is so funny, I learned this exact same thing is drivers ed. today.

"A car going twice the distance will take 4 times as long to stop"

Jul 16, 2014